# List of United States Senate elections (1788–1913)

| Key: | AJ$_#$ Anti-Jacksonian A$_#$ Anti–Administration C$_#$ Conservative D$_#$ Democratic DR$_#$ Democratic–Republican F$_#$ Federalist FL$_#$ Farmer–Labor FS$_#$ Free Soil I$_#$ Independent ID$_#$ Independent Democratic J$_#$ Jacksonian KN$_#$ Know Nothing N$_#$ Nullifier P$_#$ Pro-Administration Pg$_#$ Progressive RA$_#$ Readjuster R$_#$ Republican U$_#$ Union UU$_#$ Unconditional Union V$_#$ Vacant |

## 1788 and 1789 elections

These were the first Senate elections, which coincided with the election of President George Washington. As of this election, formal organized political parties had yet to form in the United States, but two political factions were present: The coalition of senators who supported George Washington's administration were known as "Pro-Administration," and the senators against him as "Anti-Administration." Members are informally grouped into factions of similar interest, based on an analysis of their voting record.
| V$_1$ |
| A$_1$ | A$_2$ | A$_3$ | A$_4$ | A$_5$ | A$_6$ | A$_7$ | P$_{13}$ | P$_{12}$ | P$_{11}$ |
| Majority → | | | | | | | | | P$_{11}$ |
| P$_1$ | P$_2$ | P$_3$ | P$_4$ | P$_5$ | P$_6$ | P$_7$ | P$_8$ | P$_9$ | P$_{10}$ |
| V$_2$ |

## 1790 and 1791 elections

These were the second series of elections. In these elections, terms were up for the nine Senators in Class 1. As of these elections, formal organized political parties had yet to form in the United States, but two political factions were present: The coalition of Senators who supported President George Washington's administration were known as the Pro-Administration Party, and the Senators against him as the Anti-Administration Party.
Note: There were no political parties in this Congress. Members are informally grouped into factions of similar interest, based on an analysis of their voting record.
| A$_3$ | A$_2$ | A$_1$ |
| A$_4$ | A$_5$ | A$_6$ Re-elected | A$_7$ Gain | V$_1$ A Loss | P$_{18}$ Hold | P$_{17}$ Hold | P$_{16}$ Re-elected | P$_{15}$ Re-elected | P$_{14}$ Re-elected |
| P$_{14}$ Re-elected |||
| P$_4$ | P$_5$ | P$_6$ | P$_7$ | P$_8$ | P$_9$ | P$_{10}$ | P$_{11}$ | P$_{12}$ | P$_{13}$ Re-elected |
| P$_3$ | P$_2$ | P$_1$ |

## 1792 and 1793 elections

These elections coincided with President George Washington's unanimous re-election. In these elections, terms were up for the ten senators in class 2.
Note: There were no political parties in this Congress. Members are informally grouped into factions of similar interest, based on an analysis of their voting record.
| A$_5$ | A$_4$ | A$_3$ | A$_2$ | A$_1$ |
| A$_6$ | A$_7$ Re-elected | A$_8$ Re-elected | A$_9$ Re-elected | A$_{10}$ Hold | A$_{11}$ Gain | V$_1$ | P$_{18}$ Gain | P$_{17}$ Gain | P$_{16}$ Hold |
| P$_{16}$ Hold |||||
| P$_6$ | P$_7$ | P$_8$ | P$_9$ | P$_{10}$ | P$_{11}$ | P$_{12}$ | P$_{13}$ | P$_{14}$ Re-elected | P$_{15}$ Hold |
| P$_5$ | P$_4$ | P$_3$ | P$_2$ | P$_1$ |

## 1794 and 1795 elections

These elections had the formation of organized political parties in the United States, with the Federalist Party emerging from the Pro Administration coalition, and the Democratic-Republican Party emerging from the Anti-Administration coalition.
| A$_5$ | A$_4$ | A$_3$ | A$_2$ | A$_1$ |
| A$_6$ | A$_7$ | A$_8$ | DR$_1$ Gain | DR$_2$ Gain | V$_1$ | F$_8$ Gain | F$_7$ Gain | F$_6$ Gain | F$_5$ Gain |
| | | | | F$_4$ Gain |
| P$_6$ | P$_7$ | P$_8$ | P$_9$ | F$_4$ Gain | P$_{10}$ | P$_{11}$ | F$_1$ Gain | F$_2$ Gain | F$_3$ Gain |
| P$_5$ | P$_4$ | P$_3$ | P$_2$ | P$_1$ |

## 1796 and 1797 elections

These elections coincided with John Adams's election as President. His ruling Federalist Party gained one seat.
| DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_7$ Re-elected | DR$_8$ Hold | DR$_9$ Hold | DR$_{10}$ Gain | V$_1$ Gain | F$_{21}$ Gain | F$_{20}$ Hold | F$_{19}$ Hold | F$_{18}$ Hold | F$_{17}$ Hold |
| F$_{17}$ Hold ||||||
| F$_7$ Re-elected | F$_8$ Re-elected | F$_9$ Re-elected | F$_{10}$ Re-elected | F$_{11}$ Re-elected | F$_{12}$ Hold | F$_{13}$ Hold | F$_{14}$ Hold | F$_{15}$ Hold | F$_{16}$ Hold |
| F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1798 and 1799 elections

These elections were held at the middle of President John Adams's administration and had no net change in political control of the Senate.
| DR$_6$ Re-elected | DR$_5$ Re-elected | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_7$ Hold | DR$_8$ Hold | DR$_9$ Hold | V$_1$ DR loss | F$_{22}$ Hold | F$_{21}$ Hold | F$_{20}$ Re-elected | F$_{19}$ Re-elected | F$_{18}$ Re-elected | F$_{17}$ |
| F$_{17}$ ||||||
| F$_7$ | F$_8$ | F$_9$ | F$_{10}$ | F$_{11}$ | F$_{12}$ | F$_{13}$ | F$_{14}$ | F$_{15}$ | F$_{16}$ |
| F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1800 and 1801 elections

Coinciding with their takeover of the White House, the Democratic-Republicans took control of the Senate. Although the Federalists began the next (7th) Congress with a slim majority, they lost their majority shortly thereafter due to mid-year special elections.
| DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_7$ | DR$_8$ | DR$_9$ Re-elected | DR$_{10}$ Hold | DR$_{11}$ Gain | DR$_{12}$ Gain | DR$_{13}$ Gain | DR$_{14}$ Gain | V$_1$ F loss | F$_{17}$ Gain |
| F$_{17}$ Gain ||||||
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | F$_{16}$ Re-elected |
| F$_7$ | F$_8$ | F$_9$ | F$_{10}$ | F$_{11}$ | F$_{12}$ | F$_{16}$ Re-elected | F$_{13}$ | F$_{14}$ | F$_{15}$ Re-elected |
| F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1802 and 1803 elections

These elections had the Democratic-Republicans assume an overwhelming control of the Senate.
| DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_7$ | DR$_8$ | DR$_9$ | DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{17}$ Re-elected |
| F$_7$ Re-elected | F$_8$ Re-elected | F$_9$ Hold | V$_1$ Fed loss | DR$_{22}$ Gain | DR$_{17}$ Re-elected | DR$_{21}$ Gain | DR$_{20}$ Gain | DR$_{19}$ Gain | DR$_{18}$ Gain |
| F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1804 and 1805 elections

These elections expanded the Democratic-Republicans' overwhelming control of the Senate. The Federalists went into the elections with such a small share of seats (9 out of 34, or 26%) that even had they won every election, they would have still remained a minority caucus.
| DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_8$ | DR$_9$ | DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{18}$ |
| DR$_{27}$ Gain | DR$_{26}$ Gain | DR$_{25}$ Hold | DR$_{24}$ Hold | DR$_{23}$ Hold | DR$_{22}$ Hold | DR$_{18}$ | DR$_{21}$ Re-elected | DR$_{20}$ Re-elected | DR$_{19}$ Re-elected |
| F$_7$ Re-elected | F$_6$ Re-elected | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1806 and 1807 elections

| DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_8$ | DR$_9$ | DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{18}$ |
| DR$_{27}$ Hold | DR$_{26}$ Hold | DR$_{25}$ Hold | DR$_{24}$ Re-elected | DR$_{23}$ Re-elected | DR$_{22}$ Re-elected | DR$_{18}$ | DR$_{21}$ Re-elected | DR$_{20}$ Re-elected | DR$_{19}$ Re-elected |
| DR$_{28}$ Gain | F$_6$ Re-elected | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1808 and 1809 elections

| DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_8$ | DR$_9$ | DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{18}$ |
| DR$_{27}$ Hold | DR$_{26}$ Hold | DR$_{25}$ Hold | DR$_{24}$ Re-elected | DR$_{23}$ Re-elected | DR$_{22}$ Re-elected | DR$_{18}$ | DR$_{21}$ Re-elected | DR$_{20}$ Re-elected | DR$_{19}$ |
| F$_7$ Gain | F$_6$ Hold | F$_5$ Re-elected | F$_4$ Re-elected | F$_3$ | F$_2$ | F$_1$ |

## 1810 and 1811 elections

The Democratic-Republicans held their majority unchanged. The minority Federalists had gone into the elections with such a small share of Senate seats (8 out of 34, or 23.5%) that they had won all of the elections, they would still not have controlled a majority.
| DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_8$ | DR$_9$ | DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{18}$ Hold |
| V$_1$ F Loss | DR$_{26}$ Re-elected | DR$_{25}$ Re-elected | DR$_{24}$ Re-elected | DR$_{23}$ Re-elected | DR$_{22}$ Re-elected | DR$_{18}$ Hold | DR$_{21}$ Re-elected | DR$_{20}$ Hold | DR$_{19}$ Hold |
| F$_7$ Re-elected | F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1812 and 1813 elections

Coinciding with President James Madison's re-election, the Democratic-Republican Party lost two seats but still retained an overwhelming majority in the Senate. As in recent elections, the minority Federalists had gone into the elections with such a small share of Senate seats that if they had won every one of the elections, they would still not have controlled a majority.
| DR$_8$ | DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_9$ | DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ | DR$_{18}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{19}$ |
| V$_1$ DR Loss | DR$_{27}$ Hold | DR$_{26}$ Re-elected | DR$_{25}$ Re-elected | DR$_{24}$ Hold | DR$_{23}$ Hold | DR$_{22}$ Hold | DR$_{19}$ | DR$_{21}$ Hold | DR$_{20}$ Hold |
| V$_2$ F Loss | F$_6$ Gain | F$_5$ Re-elected | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1814 and 1815 elections

The Democratic-Republicans lost a seat but still retained an overwhelming majority in the Senate. Unlike in recent elections, the minority Federalists had gone into the elections with a change of regaining their long-lost majority had they swept almost all the seats. However, only one seat switched parties. Two seats held by Democratic-Republicans were left unfilled until long after the next Congress began.
| DR$_8$ | DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_9$ | DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ | DR$_{18}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{19}$ Re-elected |
| F$_9$ Re-elected | F$_{10}$ Re-elected | F$_{11}$ Gain | V$_1$ DR Loss | V$_2$ DR Loss | DR$_{23}$ Hold | DR$_{22}$ Hold | DR$_{19}$ Re-elected | DR$_{21}$ Hold | DR$_{20}$ Hold |
| F$_8$ Re-elected | F$_7$ Re-elected | F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1816 and 1817 elections

| DR$_9$ | DR$_8$ | DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_{10}$ | DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ Gain | DR$_{16}$ Gain | DR$_{17}$ Re-elected | DR$_{18}$ Hold | DR$_{19}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{20}$ Hold |
| F$_{10}$ | F$_{11}$ Hold | F$_{12}$ Gain | F$_{13}$ Gain | DR$_{25}$ Gain | DR$_{24}$ Gain | DR$_{23}$ Hold | DR$_{22}$ Hold | DR$_{20}$ Hold | DR$_{21}$ Hold |
| F$_9$ | F$_8$ | F$_7$ | F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1818 and 1819 elections

| DR$_{10}$ | DR$_9$ | DR$_8$ | DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ | DR$_3$ | DR$_2$ | DR$_1$ |
| DR$_{11}$ | DR$_{12}$ | DR$_{13}$ | DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ | DR$_{18}$ | DR$_{19}$ Re-elected | DR$_{20}$ Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{21}$ Re-elected |
| V$_1$ F Loss | DR$_{30}$ New seat | DR$_{29}$ Gain | DR$_{28}$ Hold | DR$_{27}$ Hold | DR$_{26}$ Hold | DR$_{25}$ Hold | DR$_{24}$ Hold | DR$_{23}$ Hold | DR$_{22}$ Hold |
| V$_2$ F Loss | F$_9$ | F$_8$ | F$_7$ | F$_6$ | F$_5$ | F$_4$ | F$_3$ | F$_2$ | F$_1$ |

## 1820 and 1821 elections

| | | | | | | | DR$_1$ | DR$_2$ | DR$_3$ |
| DR$_{13}$ | DR$_{12}$ | DR$_{11}$ | DR$_{10}$ | DR$_9$ | DR$_8$ | DR$_7$ | DR$_6$ | DR$_5$ | DR$_4$ |
| DR$_{14}$ | DR$_{15}$ | DR$_{16}$ | DR$_{17}$ | DR$_{18}$ | DR$_{19}$ | DR$_{20}$ | DR$_{21}$ | DR$_{22}$ | DR$_{23}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{24}$ |
| DR$_{33}$ Hold | DR$_{32}$ Re-elected | DR$_{31}$ Re-elected | DR$_{30}$ Re-elected | DR$_{29}$ Re-elected | DR$_{28}$ Re-elected | DR$_{27}$ | DR$_{26}$ | DR$_{25}$ | DR$_{24}$ |
| DR$_{34}$ Hold | DR$_{35}$ Hold | DR$_{36}$ Gain | DR$_{37}$ Gain | DR$_{38}$ Gain | DR$_{39}$ Gain | V$_1$ | V$_2$ | V$_3$ | F$_4$ Re-elected |
| | | | | | | | F$_1$ | F$_2$ | F$_3$ |

## 1822 and 1823 elections

| | | | | | | DR$_1$ | DR$_2$ | DR$_3$ | DR$_4$ |
| DR$_{14}$ | DR$_{13}$ | DR$_{12}$ | DR$_{11}$ | DR$_{10}$ | DR$_9$ | DR$_8$ | DR$_7$ | DR$_6$ | DR$_5$ |
| DR$_{15}$ | DR$_{16}$ | DR$_{17}$ | DR$_{18}$ | DR1$_{19}$ | DR$_{20}$ | DR$_{21}$ | DR$_{22}$ | DR$_{23}$ | DR$_{24}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | DR$_{25}$ |
| DR$_{34}$ Hold | DR$_{33}$ Hold | DR$_{32}$ Hold | DR$_{31}$ Hold | DR$_{30}$ | DR$_{29}$ | DR$_{28}$ | DR$_{27}$ | DR$_{26}$ | DR$_{25}$ |
| DR$_{35}$ Re-elected | DR$_{36}$ Re-elected | DR$_{37}$ Re-elected | DR$_{38}$ Re-elected | DR$_{39}$ Re-elected | DR$_{40}$ Re-elected | DR$_{41}$ Re-elected | DR$_{42}$ Re-elected | DR$_{43}$ Re-elected | DR$_{44}$ Re-elected |
| | | | | | | F$_1$ | F$_2$ | F$_3$ Re-elected | V$_1$ |

## 1824 and 1825 elections

The elections of 1824 and 1825 saw the Jacksonians gain a majority over the Anti-Jacksonians (sometimes called the "National Republican Party").
| Factions: | DRa/Fa$_#$ = Adams-Clay factions | DRc$_#$ = Crawford faction | DRj$_#$ = Jackson faction |
| | | | | | | AJ$_1$ Gain | AJ$_2$ Gain | AJ$_3$ Gain | AJ$_4$ Gain |
| DRc$_3$ | DRc$_2$ | DRc$_1$ | DRa$_{11}$ | DRa$_{10}$ | DRa$_9$ | V$_2$ Fa Loss | V$_1$ DR Loss | AJ$_6$ Gain | AJ$_5$ Gain |
| DRc$_4$ | DRc$_5$ | DRc$_6$ | DRc$_7$ | DRc$_8$ | DRc$_9$ | J$_1$ Gain | J$_2$ Gain | J$_3$ Gain | J$_4$ Gain |
| DRj$_3$ | DRj$_2$ | DRj$_1$ | DRc$_{20}$ | DRc$_{19}$ | DRc$_{18}$ | DRc$_{17}$ | DRc$_{16}$ | J$_6$ Gain | J$_5$ Gain |
| DRj$_4$ | DRj$_5$ | DRj$_6$ | DRj$_7$ | DRj$_8$ | DRj$_9$ | DRj$_{10}$ | DRj$_{11}$ | J$_7$ Gain | J$_8$ Gain |
| | | | | | | Fa$_1$ | Fa$_2$ | Fa$_3$ | Fa$_4$ |

## 1826 and 1827 elections

| | | | | | | AJ$_1$ | AJ$_2$ | AJ$_3$ | AJ$_4$ |
| AJ$_{14}$ | AJ$_{13}$ | AJ$_{12}$ | AJ$_{11}$ | AJ$_{10}$ | AJ$_9$ | AJ$_8$ | AJ$_7$ | AJ$_6$ | AJ$_5$ |
| AJ$_{15}$ Re-elected | AJ$_{16}$ Re-elected | AJ$_{17}$ Re-elected | AJ$_{18}$ Re-elected | AJ$_{19}$ Hold | AJ$_{20}$ Gain | V$_1$ Gain | J$_{27}$ Gain | J$_{26}$ Gain | J$_{25}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | J$_{24}$ Hold |
| J$_{15}$ | J$_{16}$ | J$_{17}$ | J$_{18}$ | J$_{19}$ Re-elected | J$_{20}$ Re-elected | J$_{21}$ Re-elected | J$_{22}$ Re-elected | J$_{23}$ Hold | J$_{24}$ Hold |
| J$_{14}$ | J$_{13}$ | J$_{12}$ | J$_{11}$ | J$_{10}$ | J$_9$ | J$_8$ | J$_7$ | J$_6$ | J$_5$ |
| | | | | | | J$_1$ | J$_2$ | J$_3$ | J$_4$ |

## 1828 and 1829 elections

| | | | | | | AJ$_1$ | AJ$_2$ | AJ$_3$ | AJ$_4$ |
| AJ$_{14}$ | AJ$_{13}$ | AJ$_{12}$ | AJ$_{11}$ | AJ$_{10}$ | AJ$_9$ | AJ$_8$ | AJ$_7$ | AJ$_6$ | AJ$_5$ |
| AJ$_{15}$ | AJ$_{16}$ | AJ$_{17}$ Re-elected | AJ$_{18}$ Re-elected | AJ$_{19}$ Re-elected | AJ$_{20}$ Gain | AJ$_{21}$ Gain | AJ$_{22}$ Gain | J$_{26}$ Gain | J$_{25}$ Gain |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | J$_{24}$ Hold |
| J$_{15}$ | J$_{16}$ | J$_{17}$ Re-elected | J$_{18}$ Re-elected | J$_{19}$ Re-elected | J$_{20}$ Re-elected | J$_{21}$ Re-elected | J$_{22}$ Hold | J$_{23}$ Hold | J$_{24}$ Hold |
| J$_{14}$ | J$_{13}$ | J$_{12}$ | J$_{11}$ | J$_{10}$ | J$_9$ | J$_8$ | J$_7$ | J$_6$ | J$_5$ |
| | | | | | | J$_1$ | J$_2$ | J$_3$ | J$_4$ |

## 1830 and 1831 elections

| | | | | | | AJ$_1$ | AJ$_2$ | AJ$_3$ | AJ$_4$ |
| AJ$_{14}$ | AJ$_{13}$ | AJ$_{12}$ | AJ$_{11}$ | AJ$_{10}$ | AJ$_9$ | AJ$_8$ | AJ$_7$ | AJ$_6$ | AJ$_5$ |
| AJ$_{15}$ Re-elected | AJ$_{16}$ Re-elected | AJ$_{17}$ Re-elected | AJ$_{18}$ Hold | AJ$_{19}$ Hold | AJ$_{20}$ Hold | V$_1$ | N$_1$ Gain | J$_{26}$ Gain | J$_{25}$ Gain |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | J$_{24}$ Gain |
| J$_{15}$ | J$_{16}$ | J$_{17}$ | J$_{18}$ | J$_{19}$ Re-elected | J$_{20}$ Re-elected | J$_{21}$ Hold | J$_{22}$ Hold | J$_{23}$ Hold | J$_{24}$ Gain |
| J$_{14}$ | J$_{13}$ | J$_{12}$ | J$_{11}$ | J$_{10}$ | J$_9$ | J$_8$ | J$_7$ | J$_6$ | J$_5$ |
| | | | | | | J$_1$ | J$_2$ | J$_3$ | J$_4$ |

## 1832 and 1833 elections

| | | | | | | AJ$_1$ | AJ$_2$ | AJ$_3$ | AJ$_4$ |
| AJ$_{14}$ | AJ$_{13}$ | AJ$_{12}$ | AJ$_{11}$ | AJ$_{10}$ | AJ$_9$ | AJ$_8$ | AJ$_7$ | AJ$_6$ | AJ$_5$ |
| AJ$_{15}$ | AJ$_{16}$ Re-elected | AJ$_{17}$ Re-elected | AJ$_{18}$ Re-elected | AJ$_{19}$ Hold | AJ$_{20}$ Hold | AJ$_{21}$ Gain | AJ$_{22}$ Gain | AJ$_{23}$ Gain | N$_1$ |
| Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | N$_2$ |
| J$_{15}$ | J$_{16}$ Re-elected | J$_{17}$ Re-elected | J$_{18}$ Re-elected | J$_{19}$ Hold | J$_{20}$ Gain | J$_{21}$ Gain | V$_1$ Loss | V$_2$ Loss | N$_2$ |
| J$_{14}$ | J$_{13}$ | J$_{12}$ | J$_{11}$ | J$_{10}$ | J$_9$ | J$_8$ | J$_7$ | J$_6$ | J$_5$ |
| | | | | | | J$_1$ | J$_2$ | J$_3$ | J$_4$ |

## 1834 and 1835 elections

| | | | | | | AJ$_1$ | AJ$_2$ | AJ$_3$ | AJ$_4$ |
| AJ$_{14}$ | AJ$_{13}$ | AJ$_{12}$ | AJ$_{11}$ | AJ$_{10}$ | AJ$_9$ | AJ$_8$ | AJ$_7$ | AJ$_6$ | AJ$_5$ |
| AJ$_{15}$ | AJ$_{16}$ | AJ$_{17}$ | AJ$_{18}$ | AJ$_{19}$ Re-elected | AJ$_{20}$ Re-elected | AJ$_{21}$ Re-elected | AJ$_{22}$ Hold | AJ$_{23}$ Gain | AJ$_{24}$ Gain |
| AJ$_{24}$ Gain |||||||||
| J$_{15}$ Re-elected | J$_{16}$ Re-elected | J$_{17}$ Re-elected | J$_{18}$ Re-elected | J$_{19}$ Gain | J$_{20}$ Gain | J$_{21}$ Gain | N$_1$ | N$_2$ Re-elected | V$_1$ Loss |
| J$_{14}$ Re-elected | J$_{13}$ | J$_{12}$ | J$_{11}$ | J$_{10}$ | J$_9$ | J$_8$ | J$_7$ | J$_6$ | J$_5$ |
| | | | | | | J$_1$ | J$_2$ | J$_3$ | J$_4$ |

## 1836 and 1837 elections

| | | | | AJ$_1$ | AJ$_2$ | AJ$_3$ | AJ$_4$ | AJ$_5$ | AJ$_6$ |
| W$_{16}$ Re-elected New party | W$_{15}$ Re-elected New party | W$_{14}$ Re-elected New party | W$_{13}$ Re-elected New party | AJ$_{12}$ | AJ$_{11}$ | AJ$_{10}$ | AJ$_9$ | AJ$_8$ | AJ$_7$ |
| W$_{17}$ Hold New party | N$_1$ | D$_{34}$ Gain | D$_{33}$ Gain | D$_{32}$ Gain | D$_{31}$ Hold New party | D$_{30}$ Hold New party | D$_{29}$ Re-elected New party | D$_{28}$ Re-elected New party | D$_{27}$ Re-elected New party |
| D$_{27}$ Re-elected New party |||||||||
| J$_{17}$ | J$_{18}$ | J$_{19}$ | J$_{20}$ | J$_{21}$ | J$_{22}$ | D$_{23}$ Re-elected New party | D$_{24}$ Re-elected New party | D$_{25}$ Re-elected New party | D$_{26}$ Re-elected New party |
| J$_{16}$ | J$_{15}$ | J$_{14}$ | J$_{13}$ | J$_{12}$ | J$_{11}$ | J$_{10}$ | J$_9$ | J$_8$ | J$_7$ |
| | | | | J$_1$ | J$_2$ | J$_3$ | J$_4$ | J$_5$ | J$_6$ |

## 1838 and 1839 elections

| | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ |
| D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ |
| D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{27}$ Re-elected |
| W$_{17}$ Hold | W$_{18}$ Gain | W$_{19}$ Gain | W$_{20}$ Gain | V$_4$ D Loss | V$_3$ D Loss | V$_2$ D Loss | V$_1$ D Loss | D$_{28}$ Hold | D$_{27}$ Re-elected |
| W$_{16}$ Hold | W$_{15}$ Re-elected | W$_{14}$ Re-elected | W$_{13}$ Re-elected | W$_{12}$ Re-elected | W$_{11}$ Re-elected | W$_{10}$ | W$_9$ | W$_8$ | W$_7$ |
| | | | | W$_1$ | W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ |

## 1840 and 1841 elections

| | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ |
| D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ |
| D$_{17}$ Re-elected | D$_{18}$ Re-elected | D$_{19}$ Re-elected | D$_{20}$ Hold | D$_{21}$ Hold | D$_{22}$ Re-elected | V$_3$ D Loss | V$_2$ | V$_1$ | W$_{27}$ Gain |
| W$_{27}$ Gain |||||||||
| W$_{17}$ Hold | W$_{18}$ Re-elected | W$_{19}$ Hold | W$_{20}$ Hold | W$_{21}$ Re-elected | W$_{22}$ Gain | W$_{23}$ Gain | W$_{24}$ Gain | W$_{25}$ Gain | W$_{26}$ Gain |
| W$_{16}$ | W$_{15}$ | W$_{14}$ | W$_{13}$ | W$_{12}$ | W$_{11}$ | W$_{10}$ | W$_9$ | W$_8$ | W$_7$ |
| | | | | W$_1$ | W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ |

## 1842 and 1843 elections

| | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ |
| D$_{16}$ Re-elected | D$_{15}$ Re-elected | D$_{14}$ Re-elected | D$_{13}$ Re-elected | D$_{12}$ Re-elected | D$_{11}$ Re-elected | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ |
| D$_{17}$ Re-elected | D$_{18}$ Hold | D$_{19}$ Hold | D$_{20}$ Hold | D$_{21}$ Hold | D$_{22}$ Gain | D$_{23}$ Gain | V$_2$ | V$_1$ | W$_{27}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | W$_{26}$ Hold |
| W$_{17}$ | W$_{18}$ | W$_{19}$ | W$_{20}$ | W$_{21}$ | W$_{22}$ | W$_{23}$ | W$_{24}$ Re-elected | W$_{25}$ Re-elected | W$_{26}$ Hold |
| W$_{16}$ | W$_{15}$ | W$_{14}$ | W$_{13}$ | W$_{12}$ | W$_{11}$ | W$_{10}$ | W$_9$ | W$_8$ | W$_7$ |
| | | | | W$_1$ | W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ |

## 1844 and 1845 elections

| | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ |
| D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ |
| D$_{18}$ | D$_{19}$ | D$_{20}$ Re-elected | D$_{21}$ Re-elected | D$_{22}$ Re-elected | D$_{23}$ Re-elected | D$_{24}$ Gain | D$_{25}$ Gain | D$_{26}$ Gain | D$_{27}$ Gain |
| D$_{27}$ Gain |||||||||
| W$_{18}$ Re-elected | W$_{19}$ Re-elected | W$_{20}$ Hold | W$_{21}$ Hold | W$_{22}$ Hold | W$_{23}$ Gain | W$_{24}$ Gain | V$_1$ W Loss | V$_2$ New seat | V$_3$ New seat |
| W$_{17}$ Re-elected | W$_{16}$ | W$_{15}$ | W$_{14}$ | W$_{13}$ | W$_{12}$ | W$_{11}$ | W$_{10}$ | W$_9$ | W$_8$ |
| | | | W$_1$ | W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ | W$_7$ |

## 1846 and 1847 elections

| | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ |
| D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ |
| D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ Re-elected | D$_{27}$ Re-elected | D$_{28}$ Re-elected | D$_{29}$ Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{30}$ Hold |
| V$_1$ W Loss | V$_2$ New state | V$_3$ New state | ID$_1$ Gain | D$_{35}$ Gain | D$_{34}$ Gain | D$_{33}$ Gain | D$_{32}$ Hold | D$_{31}$ Hold | D$_{30}$ Hold |
| W$_{19}$ Hold | W$_{18}$ Hold | W$_{17}$ Hold | W$_{16}$ Re-elected | W$_{15}$ Re-elected | W$_{14}$ Re-elected | W$_{13}$ Re-elected | W$_{12}$ | W$_{11}$ | W$_{10}$ |
| | W$_1$ | W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ | W$_7$ | W$_8$ | W$_9$ |

## 1848 and 1849 elections

| D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ |
| D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ |
| D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ Re-elected | D$_{26}$ Re-elected | D$_{27}$ Re-elected | D$_{28}$ Re-elected | D$_{29}$ Re-elected | D$_{30}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{31}$ Hold |
| W$_{21}$ Gain | W$_{22}$ Gain | W$_{23}$ Gain | W$_{24}$ Gain | W$_{25}$ Gain | ID$_1$ | FS$_1$ Gain | D$_{33}$ Gain | D$_{32}$ Hold | D$_{31}$ Hold |
| W$_{20}$ Hold | W$_{19}$ Re-elected | W$_{18}$ Re-elected | W$_{17}$ Re-elected | W$_{16}$ | W$_{15}$ | W$_{14}$ | W$_{13}$ | W$_{12}$ | W$_{11}$ |
| W$_1$ | W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ | W$_7$ | W$_8$ | W$_9$ | W$_{10}$ |

## 1850 and 1851 elections

| D$_1$ | | | | | | | | | |
| D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ | D$_{11}$ |
| D$_{21}$ | D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ |
| D$_{22}$ | D$_{23}$ Re-elected | D$_{24}$ Re-elected | D$_{25}$ Re-elected | D$_{26}$ Re-elected | D$_{27}$ Re-elected | D$_{28}$ Re-elected | D$_{29}$ Re-elected | D$_{30}$ Hold | D$_{31}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{32}$ Gain |
| V$_1$ W Loss | V$_2$ W Loss | FS$_1$ | FS$_2$ | V$_3$ D Loss | V$_4$ D Loss | V$_5$ D Loss | D$_{34}$ Gain | D$_{33}$ Gain | D$_{32}$ Gain |
| W$_{21}$ Gain | W$_{20}$ Gain | W$_{19}$ Hold | W$_{18}$ Re-elected | W$_{17}$ | W$_{16}$ | W$_{15}$ | W$_{14}$ | W$_{13}$ | W$_{12}$ |
| W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ | W$_7$ | W$_8$ | W$_9$ | W$_{10}$ | W$_{11}$ |
| W$_1$ | | | | | | | | | |

## 1852 and 1853 elections

| D$_1$ | | | | | | | | | |
| D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ | D$_{11}$ |
| D$_{21}$ | D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ |
| D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ | D$_{27}$ Re-elected | D$_{28}$ Re-elected | D$_{29}$ Re-elected | D$_{30}$ Re-elected | D$_{31}$ Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{32}$ Hold |
| KN$_1$ Gain | FS$_1$ | FS$_2$ | V$_1$ D Loss | V$_2$ D Loss | D$_{36}$ Gain | D$_{35}$ Gain | D$_{34}$ Hold | D$_{33}$ Hold | D$_{32}$ Hold |
| V$_3$ W Loss | V$_4$ W Loss | V$_5$ W Loss | W$_{18}$ Gain | W$_{17}$ Hold | W$_{16}$ Hold | W$_{15}$ Re-elected | W$_{14}$ | W$_{13}$ | W$_{12}$ |
| W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ | W$_7$ | W$_8$ | W$_9$ | W$_{10}$ | W$_{11}$ |
| W$_1$ | | | | | | | | | |

## 1854 and 1855 elections

| D$_1$ | | | | | | | | | |
| D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ | D$_{11}$ |
| D$_{21}$ | D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ |
| D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ Re-elected | D$_{27}$ Re-elected | D$_{28}$ Re-elected | D$_{29}$ Hold | D$_{30}$ Gain | D$_{31}$ Gain |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{32}$ Gain |
| V$_2$ | V$_3$ | V$_4$ | V$_5$ D Loss | V$_6$ D Loss | V$_7$ D Loss | V$_8$ D Loss | V$_9$ D Loss | D$_{33}$ Gain | D$_{32}$ Gain |
| V$_1$ W Loss | KN$_1$ | FS$_2$ Gain | FS$_1$ | R$_3$ Gain | R$_2$ Gain | R$_1$ Gain | W$_{14}$ Hold | W$_{13}$ Re-elected | W$_{12}$ Re-elected |
| W$_2$ | W$_3$ | W$_4$ | W$_5$ | W$_6$ | W$_7$ | W$_8$ | W$_9$ | W$_{10}$ | W$_{11}$ |
| W$_1$ | | | | | | | | | |

## 1856 and 1857 elections

The young Republican Party assumed its position as one of the United States's two main political parties. The Whigs and Free Soilers were gone by the time the next Congress began.
| D$_1$ | | | | | | | | | |
| D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ | D$_{11}$ |
| D$_{21}$ | D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ |
| D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ Re-elected | D$_{27}$ Re-elected | D$_{28}$ Re-elected | D$_{29}$ Re-elected | D$_{30}$ Re-elected | D$_{31}$ Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{32}$ Hold |
| FS$_1$ | KN$_1$ | KN$_2$ Gain | V$_1$ W Loss | V$_2$ | V$_3$ | V$_4$ | D$_{34}$ Gain | D$_{33}$ Hold | D$_{32}$ Hold |
| R$_{15}$ Gain | R$_{14}$ Re-elected Diff. party | R$_{13}$ Hold | R$_{12}$ Re-elected | R$_{11}$ Re-elected | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ |
| W$_2$ | W$_3$ | R$_1$ Gain | R$_2$ Gain | R$_3$ Gain | R$_4$ Gain | R$_5$ Gain | R$_1$ | R$_2$ | R$_3$ |
| W$_1$ | | | | | | | | | |

## 1858 and 1859 elections

| D$_3$ | D$_2$ | D$_1$ | | | | | | | |
| D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ |
| D$_{23}$ | D$_{22}$ | D$_{21}$ | D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ |
| D$_{24}$ | D$_{25}$ | D$_{26}$ Re-elected | D$_{27}$ Re-elected | D$_{28}$ Re-elected | D$_{29}$ Re-elected | D$_{30}$ Re-elected | D$_{31}$ Re-elected | D$_{32}$ Re-elected | D$_{33}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{34}$ Hold |
| R$_{24}$ Gain | R$_{25}$ Gain | KN$_1$ | KN$_2$ | V$_1$ D Loss | D$_{38}$ Gain | D$_{37}$ Gain | D$_{36}$ Hold | D$_{35}$ Hold | D$_{34}$ Hold |
| R$_{23}$ Gain | R$_{22}$ Gain | R$_{21}$ Gain | R$_{20}$ Re-elected | R$_{19}$ Re-elected | R$_{18}$ Re-elected | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ |
| R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ | R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ |
| R$_3$ | R$_2$ | R$_1$ | | | | | | | |

## 1860 and 1861 elections

| V$_3$ D Loss | V$_2$ D Loss | V$_1$ D Loss | | | | | | | |
| D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ | D$_9$ | D$_{10}$ |
| D$_{20}$ | D$_{19}$ | D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ |
| D$_{21}$ | D$_{23}$ | D$_{22}$ | D$_{24}$ | D$_{25}$ Re-elected | D$_{26}$ Re-elected | D$_{27}$ Hold | D$_{28}$ Hold | D$_{29}$ Hold | D$_{30}$ Gain |
| Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | Plurality ↑ | KN$_1$ |
| R$_{21}$ Re-elected | R$_{22}$ Re-elected | R$_{23}$ Re-elected | R$_{24}$ Re-elected | R$_{25}$ Hold | R$_{26}$ Hold | R$_{27}$ Gain | R$_{28}$ Gain | R$_{29}$ Gain | KN$_1$ |
| R$_{20}$ Re-elected | R$_{19}$ | R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ |
| R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ | R$_9$ | R$_{10}$ |
| V$_4$ D Loss | V$_5$ D Loss | V$_6$ D Loss | | | | | | | |

## 1862 and 1863 elections

| V$_4$ | V$_3$ | V$_2$ | V$_1$ | | | | | | |
| V$_5$ | V$_6$ | V$_7$ No race | V$_8$ No race | V$_9$ No race | V$_{10}$ No race | D$_1$ | D$_2$ | D$_3$ | D$_4$ |
| U$_4$ Hold | U$_3$ | U$_2$ | U$_1$ | D$_{10}$ Gain | D$_9$ Hold | D$_8$ Hold | D$_7$ Re-elected | D$_6$ | D$_5$ |
| U$_5$ Hold | UU$_1$ Gain | R$_{32}$ Gain | R$_{31}$ Gain | R$_{30}$ Re-elected | R$_{29}$ Re-elected | R$_{28}$ Hold | R$_{27}$ Hold | R$_{26}$ Re-elected | R$_{25}$ Re-elected |
| R$_{25}$ Re-elected |||||||||
| R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ Re-elected | R$_{23}$ Re-elected | R$_{24}$ Re-elected |
| R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ | R$_5$ |
| V$_{16}$ | V$_{15}$ | V$_{14}$ | V$_{13}$ | V$_{12}$ | V$_{11}$ | R$_1$ | R$_2$ | R$_3$ | R$_4$ |
| V$_{17}$ | V$_{18}$ | V$_{19}$ | V$_{20}$ | | | | | | |

## 1864 and 1865 elections

These elections, corresponding with Abraham Lincoln's re-election as president, saw the Republicans gain two seats. As these elections occurred during the Civil War, most of the Southern states were absent.
| V$_5$ Seceded | V$_4$ Seceded | V$_3$ Seceded | V$_2$ | V$_1$ | | | | | |
| V$_6$ Seceded | V$_7$ Seceded | V$_8$ Seceded | V$_9$ Seceded | V$_{10}$ Seceded | V$_{11}$ Seceded | D$_1$ | D$_2$ | D$_3$ | D$_4$ |
| UU$_2$ | UU$_3$ | UU$_4$ | U$_1$ | U$_2$ | D$_9$ Gain | D$_8$ Hold | D$_7$ Re-elected | D$_6$ | D$_5$ |
| UU$_1$ | R$_{33}$ Gain | R$_{32}$ Gain | R$_{31}$ Re-elected new party | R$_{30}$ Hold | R$_{29}$ Hold | R$_{28}$ Hold | R$_{27}$ Re-elected | R$_{26}$ Re-elected | R$_{25}$ Re-elected |
| R$_{25}$ Re-elected |||||||||
| R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ Re-elected | R$_{24}$ Re-elected |
| R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ | R$_5$ |
| V$_{17}$ | V$_{16}$ | V$_{15}$ | V$_{14}$ | V$_{13}$ | V$_{12}$ U Loss | R$_1$ | R$_2$ | R$_3$ | R$_4$ |
| V$_{18}$ | V$_{19}$ | V$_{20}$ | V$_{21}$ | V$_{22}$ | | | | | |

## 1866 and 1867 elections

| V$_6$ Seceded | V$_5$ Seceded | V$_4$ Seceded | V$_3$ Seceded | V$_2$ | V$_1$ | | | | |
| V$_7$ Seceded | V$_8$ Seceded | V$_9$ Seceded | V$_{10}$ Seceded | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ |
| R$_{37}$ Hold | R$_{38}$ Gain | R$_{39}$ Gain | UU$_1$ | U$_1$ | U$_2$ | D$_{10}$ Gain | D$_9$ Gain | D$_8$ | D$_7$ |
| R$_{36}$ Hold | R$_{35}$ Hold | R$_{34}$ Hold | R$_{33}$ Hold | R$_{32}$ Hold | R$_{31}$ Hold | R$_{30}$ Hold | R$_{29}$ Re-elected | R$_{28}$ Re-elected | R$_{17}$ Re-elected |
| R$_{17}$ Re-elected |||||||||
| R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ Re-elected | R$_{26}$ Re-elected |
| R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ |
| V$_{14}$ | V$_{13}$ | V$_{12}$ | V$_{11}$ | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ |
| V$_{15}$ | V$_{16}$ | V$_{17}$ | V$_{18}$ | V$_{19}$ | V$_{20}$ | | | | |

## 1868 and 1869 elections

| D$_3$ | D$_2$ | D$_1$ | V$_4$ Seceded | V$_3$ Seceded | V$_2$ Seceded | V$_1$ | | | |
| D$_4$ | D$_5$ Hold | D$_6$ Hold | D$_7$ Gain | D$_8$ Gain | D$_9$ Gain | R$_{57}$ Gain | R$_{56}$ Gain | R$_{55}$ Gain | R$_{54}$ Hold |
| R$_{44}$ Re-elected | R$_{45}$ Re-elected | R$_{46}$ Re-elected | R$_{47}$ Re-elected | R$_{48}$ Hold | R$_{49}$ Hold | R$_{50}$ Hold | R$_{51}$ Hold | R$_{52}$ Hold | R$_{53}$ Hold |
| R$_{43}$ Re-elected | R$_{42}$ Re-elected | R$_{41}$ Re-elected | R$_{40}$ | R$_{39}$ | R$_{38}$ | R$_{37}$ | R$_{36}$ | R$_{35}$ | R$_{34}$ |
| R$_{34}$ |||||||||
| R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ | R$_{28}$ | R$_{29}$ | R$_{30}$ | R$_{31}$ | R$_{32}$ | R$_{33}$ |
| R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ | R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ |
| R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ | R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ |
| R$_3$ | R$_2$ | R$_1$ | V$_5$ | V$_6$ | V$_7$ | V$_8$ | | | |

## 1870 and 1871 elections

| D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | | |
| D$_8$ Hold | D$_9$ Hold | D$_{10}$ Hold | D$_{11}$ Gain | D$_{12}$ Gain | D$_{13}$ Gain | D$_{14}$ Gain | V$_1$ D Loss | V$_2$ R Loss | R$_{58}$ Hold |
| R$_{48}$ Re-elected | R$_{49}$ Hold | R$_{50}$ Hold | R$_{51}$ Hold | R$_{52}$ Hold | R$_{53}$ Hold | R$_{54}$ Hold | R$_{55}$ Hold | R$_{56}$ Hold | R$_{57}$ Hold |
| R$_{47}$ Re-elected | R$_{46}$ Re-elected | R$_{45}$ Re-elected | R$_{44}$ Re-elected | R$_{43}$ Re-elected | R$_{42}$ | R$_{41}$ | R$_{40}$ | R$_{39}$ | R$_{38}$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{37}$ |
| R$_{28}$ | R$_{29}$ | R$_{30}$ | R$_{31}$ | R$_{32}$ | R$_{33}$ | R$_{34}$ | R$_{35}$ | R$_{36}$ | R$_{37}$ |
| R$_{27}$ | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ | R$_{18}$ |
| R$_8$ | R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ |
| R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | | |

## 1872 and 1873 elections

| D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | | |
| D$_8$ | D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ Hold | D$_{16}$ Hold | D$_{17}$ Hold |
| R$_{48}$ Hold | R$_{49}$ Hold | R$_{50}$ Hold | R$_{51}$ Hold | R$_{52}$ Hold | R$_{53}$ Hold | R$_{54}$ Gain | V$_1$ R Loss | D$_{19}$ Gain | D$_{18}$ Gain |
| R$_{47}$ Hold | R$_{46}$ Hold | R$_{45}$ Hold | R$_{44}$ Re-elected | R$_{43}$ Re-elected | R$_{42}$ Re-elected | R$_{41}$ Re-elected | R$_{40}$ Re-elected | R$_{39}$ Re-elected | R$_{38}$ Re-elected |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{37}$ Re-elected |
| R$_{28}$ | R$_{29}$ | R$_{30}$ | R$_{31}$ | R$_{32}$ | R$_{33}$ | R$_{34}$ | R$_{35}$ | R$_{36}$ | R$_{37}$ Re-elected |
| R$_{27}$ | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ | R$_{18}$ |
| R$_8$ | R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ |
| R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | | |

## 1874 and 1875 elections

| D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | | |
| D$_8$ | D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ Re-elected | D$_{16}$ Re-elected | D$_{17}$ Hold |
| D$_{27}$ Gain | D$_{26}$ Gain | D$_{25}$ Gain | D$_{24}$ Gain | D$_{23}$ Gain | D$_{22}$ Gain | D$_{21}$ Gain | D$_{20}$ Gain | D$_{19}$ Gain | D$_{18}$ Hold |
| D$_{28}$ Gain | AM$_1$ Gain | V$_1$ | LR$_2$ | LR$_1$ | R$_{42}$ Hold | R$_{41}$ Hold | R$_{40}$ Hold | R$_{39}$ Hold | R$_{38}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{37}$ Hold |
| R$_{28}$ | R$_{29}$ | R$_{30}$ | R$_{31}$ | R$_{32}$ | R$_{33}$ Re-elected | R$_{34}$ Re-elected | R$_{35}$ Hold | R$_{36}$ Hold | R$_{37}$ Hold |
| R$_{27}$ | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ | R$_{18}$ |
| R$_8$ | R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ |
| R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | | |

## 1876 and 1877 elections

| D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | |
| D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ |
| D$_{28}$ Hold | D$_{27}$ Hold | D$_{26}$ Hold | D$_{25}$ Re-elected | D$_{24}$ Re-elected | D$_{23}$ Re-elected | D$_{22}$ Re-elected | D$_{21}$ | D$_{20}$ | D$_{19}$ |
| D$_{29}$ Hold | D$_{30}$ Hold | D$_{31}$ Gain | D$_{32}$ Gain | D$_{33}$ Gain | D$_{34}$ Gain | D$_{35}$ Gain | I$_1$ Gain | AM$_1$ | R$_{39}$ Hold |
| R$_{39}$ Hold |||||||||
| R$_{29}$ Re-elected | R$_{30}$ Re-elected | R$_{31}$ Re-elected | R$_{32}$ Re-elected | R$_{33}$ Re-elected | R$_{34}$ Hold | R$_{35}$ Hold | R$_{36}$ Hold | R$_{37}$ Hold | R$_{38}$ Hold |
| R$_{28}$ | R$_{27}$ | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ |
| R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ |
| R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | |

## 1878 and 1879 elections

| D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | |
| D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ |
| D$_{28}$ | D$_{27}$ | D$_{26}$ | D$_{25}$ | D$_{24}$ | D$_{23}$ | D$_{22}$ | D$_{21}$ | D$_{20}$ | D$_{19}$ |
| D$_{29}$ Re-elected | D$_{30}$ Re-elected | D$_{31}$ Hold | D$_{32}$ Hold | D$_{33}$ Hold | D$_{34}$ Hold | D$_{35}$ Hold | D$_{36}$ Gain | D$_{37}$ Gain | D$_{38}$ Gain |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | D$_{39}$ Gain |
| R$_{29}$ Hold | R$_{30}$ Hold | R$_{31}$ Gain | V$_1$ R loss | AM$_1$ | I$_1$ | D$_{42}$ Gain | D$_{41}$ Gain | D$_{40}$ Gain | D$_{39}$ Gain |
| R$_{28}$ Hold | R$_{27}$ Re-elected | R$_{26}$ Re-elected | R$_{25}$ Re-elected | R$_{24}$ Re-elected | R$_{23}$ Re-elected | R$_{22}$ Re-elected | R$_{21}$ | R$_{20}$ | R$_{19}$ |
| R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ |
| R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | |

## 1880 and 1881 elections

| D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | |
| D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ |
| D$_{28}$ | D$_{27}$ | D$_{26}$ | D$_{25}$ | D$_{24}$ | D$_{23}$ | D$_{22}$ | D$_{21}$ | D$_{20}$ | D$_{19}$ |
| D$_{29}$ Re-elected | D$_{30}$ Re-elected | D$_{31}$ Re-elected | D$_{33}$ Re-elected | D$_{33}$ Hold | D$_{34}$ Hold | D$_{35}$ Hold | D$_{36}$ Gain | D$_{37}$ Gain | I$_1$ |
| Plurality ↓ | Plurality ↓ | Plurality ↓ | Plurality ↓ | Plurality ↓ | Plurality ↓ | Plurality ↓ | Plurality ↓ | Plurality ↓ | RA$_1$ Gain |
| R$_{29}$ Hold | R$_{30}$ Hold | R$_{31}$ Gain | R$_{32}$ Gain | R$_{33}$ Gain | R$_{34}$ Gain | R$_{35}$ Gain | R$_{36}$ Gain | R$_{37}$ Gain | RA$_1$ Gain |
| R$_{28}$ Hold | R$_{27}$ Hold | R$_{26}$ Re-elected | R$_{25}$ Re-elected | R$_{24}$ Re-elected | R$_{23}$ Re-elected | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ |
| R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ |
| R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | |

## 1882 and 1883 elections

| D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | |
| D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ |
| D$_{28}$ Re-elected | D$_{27}$ Re-elected | D$_{26}$ Re-elected | D$_{25}$ Re-elected | D$_{24}$ Re-elected | D$_{23}$ | D$_{22}$ | D$_{21}$ | D$_{20}$ | D$_{19}$ |
| D$_{29}$ Re-elected | D$_{30}$ Re-elected | D$_{31}$ Re-elected | D$_{32}$ Re-elected | D$_{33}$ Re-elected | D$_{34}$ Hold | D$_{35}$ Hold | D$_{36}$ Gain | V$_1$ R Loss | RA$_2$ Gain |
| Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | Majority, with Readjusters in caucus ↓ | RA$_1$ |
| R$_{29}$ Re-elected | R$_{30}$ Re-elected | R$_{31}$ Hold | R$_{32}$ Hold | R$_{33}$ Hold | R$_{34}$ Hold | R$_{35}$ Hold | R$_{36}$ Gain | R$_{37}$ Gain | RA$_1$ |
| R$_{28}$ Re-elected | R$_{27}$ Re-elected | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ |
| R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ |
| R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | |

## 1884 and 1885 elections

| D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | |
| D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ |
| D$_{28}$ Re-elected | D$_{27}$ Re-elected | D$_{26}$ Re-elected | D$_{25}$ Re-elected | D$_{24}$ Re-elected | D$_{23}$ Re-elected | D$_{22}$ | D$_{21}$ | D$_{20}$ | D$_{19}$ |
| D$_{29}$ Re-elected | D$_{30}$ Hold | D$_{31}$ Hold | D$_{32}$ Hold | D$_{33}$ Hold | D$_{34}$ Hold | V$_1$ D Loss | V$_2$ R Loss | V$_3$ R Loss | RA$_1$ |
| Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | Majority due to three vacancies ↓ | RA$_2$ |
| R$_{29}$ Re-elected | R$_{30}$ Re-elected | R$_{31}$ Re-elected | R$_{32}$ Re-elected | R$_{33}$ Re-elected | R$_{34}$ Hold | R$_{35}$ Hold | R$_{36}$ Hold | R$_{37}$ Gain | RA$_2$ |
| R$_{28}$ Re-elected | R$_{27}$ | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ |
| R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ |
| R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | |

## 1886 and 1887 elections

| D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | |
| D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ |
| D$_{28}$ Re-elected | D$_{27}$ Re-elected | D$_{26}$ Re-elected | D$_{25}$ | D$_{24}$ | D$_{23}$ | D$_{22}$ | D$_{21}$ | D$_{20}$ | D$_{19}$ |
| D$_{29}$ Re-elected | D$_{30}$ Hold | D$_{31}$ Hold | D$_{32}$ Hold | D$_{33}$ Gain | D$_{34}$ Gain | D$_{35}$ Gain | D$_{36}$ Gain | V$_1$ D Loss | RA$_2$ |
| Majority due to vacancy→ | Majority due to vacancy→ | Majority due to vacancy→ | Majority due to vacancy→ | Majority due to vacancy→ | Majority due to vacancy→ | Majority due to vacancy→ | Majority due to vacancy→ | Majority due to vacancy→ | R$_{38}$ Gain |
| R$_{29}$ Re-elected | R$_{30}$ Re-elected | R$_{31}$ Re-elected | R$_{32}$ Re-elected | R$_{33}$ Hold | R$_{34}$ Hold | R$_{35}$ Hold | R$_{36}$ Hold | R$_{37}$ Hold | R$_{38}$ Gain |
| R$_{28}$ Re-elected | R$_{27}$ Re-elected | R$_{26}$ Re-elected | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ |
| R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ |
| R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | |

## 1888 and 1889 elections

These elections coincided with Benjamin Harrison's victory over incumbent President Grover Cleveland. Both parties were unchanged in the general elections, but later special elections would give Republicans an eight-seat majority, mostly from newly admitted states.
| D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ | D$_2$ | D$_1$ | | |
| D$_9$ | D$_{10}$ | D$_{11}$ | D$_{12}$ | D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ |
| D$_{28}$ Re-elected | D$_{27}$ Re-elected | D$_{26}$ Re-elected | D$_{25}$ Re-elected | D$_{24}$ | D$_{23}$ | D$_{22}$ | D$_{21}$ | D$_{20}$ | D$_{19}$ |
| D$_{29}$ Re-elected | D$_{30}$ Re-elected | D$_{31}$ Re-elected | D$_{32}$ Re-elected | D$_{33}$ Re-elected | D$_{34}$ Re-elected | D$_{35}$ Re-elected | D$_{36}$ Re-elected | D$_{37}$ Gain | V$_1$ R Loss |
| Majority due to vacancy → | Majority due to vacancy → | Majority due to vacancy → | Majority due to vacancy → | Majority due to vacancy → | Majority due to vacancy → | Majority due to vacancy → | Majority due to vacancy → | Majority due to vacancy → | R$_{38}$ Gain |
| R$_{29}$ Re-elected | R$_{30}$ Re-elected | R$_{31}$ Re-elected | R$_{32}$ Re-elected | R$_{33}$ Re-elected | R$_{39}$ Re-elected | R$_{35}$ Hold | R$_{36}$ Hold | R$_{37}$ Hold | R$_{38}$ Gain |
| R$_{28}$ Re-elected | R$_{27}$ Re-elected | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ | R$_{22}$ | R$_{21}$ | R$_{20}$ | R$_{19}$ |
| R$_9$ | R$_{10}$ | R$_{11}$ | R$_{12}$ | R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ |
| R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ | R$_2$ | R$_1$ | | |

## 1890 and 1891 elections

| | | | | | | | | D$_1$ | D$_2$ |
| D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ | D$_5$ | D$_4$ | D$_3$ |
| D$_{13}$ | D$_{14}$ | D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ |
| D$_{32}$ Re-elected | D$_{31}$ Re-elected | D$_{30}$ Re-elected | D$_{29}$ Re-elected | D$_{28}$ Re-elected | D$_{27}$ Re-elected | D$_{26}$ Re-elected | D$_{25}$ | D$_{24}$ | D$_{23}$ |
| D$_{33}$ Re-elected | D$_{34}$ Hold | D$_{35}$ Hold | D$_{36}$ Hold | D$_{37}$ Hold | D$_{38}$ Gain | D$_{39}$ Gain | D$_{40}$ Gain | I$_1$ Gain | P$_1$ Gain |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{43}$ New seat |
| R$_{33}$ Re-elected | R$_{34}$ Re-elected | R$_{35}$ Re-elected | R$_{36}$ Re-elected | R$_{37}$ Re-elected | R$_{38}$ Re-elected | R$_{39}$ Re-elected | R$_{40}$ Re-elected | R$_{41}$ Hold | R$_{42}$ Hold |
| R$_{32}$ Re-elected | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ | R$_{26}$ | R$_{25}$ | R$_{24}$ | R$_{23}$ |
| R$_{13}$ | R$_{14}$ | R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ |
| R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ | R$_5$ | R$_4$ | R$_3$ |
| | | | | | | | | R$_1$ | R$_2$ |

## 1892 and 1893 elections

| | | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ |
| D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ | D$_5$ |
| D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ |
| D$_{34}$ Re-elected | D$_{33}$ Re-elected | D$_{32}$ Re-elected | D$_{31}$ Re-elected | D$_{30}$ Re-elected | D$_{29}$ | D$_{28}$ | D$_{27}$ | D$_{26}$ | D$_{25}$ |
| D$_{35}$ Re-elected | D$_{36}$ Re-elected | D$_{37}$ Re-elected | D$_{38}$ Hold | D$_{39}$ Hold | D$_{30}$ Gain | D$_{41}$ Gain | D$_{42}$ Gain | V$_1$ D loss | V$_2$ R loss |
| Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | D$_{43}$ Gain | V$_1$ D loss | V$_3$ R loss |
| R$_{35}$ Re-elected | R$_{36}$ Re-elected | R$_{37}$ Hold | SR$_1$ Gain | P$_1$ | P$_2$ | P$_3$ Gain | D$_{43}$ Gain | V$_1$ D loss | V$_4$ R loss |
| R$_{34}$ Re-elected | R$_{33}$ Re-elected | R$_{32}$ Re-elected | R$_{31}$ Re-elected | R$_{30}$ Re-elected | R$_{29}$ Re-elected | R$_{28}$ | R$_{27}$ | R$_{26}$ | R$_{25}$ |
| R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ |
| R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ | R$_5$ |
| | | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ |

## 1894 and 1895 elections

| | | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ |
| D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ | D$_5$ |
| D$_{15}$ | D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ |
| D$_{34}$ Re-elected | D$_{33}$ Re-elected | D$_{32}$ Re-elected | D$_{31}$ Re-elected | D$_{30}$ | D$_{29}$ | D$_{28}$ | D$_{27}$ | D$_{26}$ | D$_{25}$ |
| D$_{35}$ Hold | D$_{36}$ Hold | D$_{37}$ Hold | D$_{38}$ Hold | D$_{39}$ Hold | D$_{40}$ Retired | P$_4$ Gain | P$_3$ | V$_4$ R Loss | V$_1$ |
| No majority | No majority | No majority | No majority | No majority | No majority | No majority | No majority | V$_4$ R Loss | V$_2$ |
| R$_{35}$ Hold | R$_{36}$ Hold | R$_{37}$ Gain | R$_{38}$ Gain | R$_{39}$ Gain | SR$_1$ | P$_1$ | P$_2$ | V$_4$ R Loss | V$_3$ |
| R$_{34}$ Hold | R$_{33}$ Hold | R$_{32}$ Hold | R$_{31}$ Hold | R$_{30}$ Hold | R$_{29}$ Re-elected | R$_{28}$ Re-elected | R$_{27}$ Re-elected | R$_{26}$ Re-elected | R$_{25}$ Re-elected |
| R$_{15}$ | R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ Re-elected | R$_{23}$ Re-elected | R$_{24}$ Re-elected |
| R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ | R$_5$ |
| | | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ |

## 1896 and 1897 elections

| | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ |
| D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ |
| D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ |
| P$_3$ Re-elected | P$_4$ Hold | P$_5$ Gain | D$_{32}$ Gain | D$_{31}$ Hold | D$_{30}$ Hold | D$_{29}$ Hold | D$_{28}$ Hold | D$_{27}$ Re-elected | D$_{26}$ Re-elected |
| P$_2$ | P$_1$ | S$_2$ Re-elected | S$_1$ | SR$_2$ Re-elected | SR$_1$ Gain | R$_{46}$ Gain | R$_{45}$ Gain | R$_{44}$ Gain | V$_1$ D Loss |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{44}$ Gain | V$_2$ |
| R$_{36}$ Re-elected | R$_{37}$ Re-elected | R$_{38}$ Re-elected | R$_{39}$ Hold | R$_{40}$ Gain | R$_{41}$ Gain | R$_{42}$ Gain | R$_{43}$ Gain | R$_{44}$ Gain | V$_3$ R Loss |
| R$_{35}$ Re-elected | R$_{34}$ Re-elected | R$_{33}$ Re-elected | R$_{32}$ Re-elected | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ | R$_{26}$ |
| R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ |
| R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ |
| | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ |

## 1898 and 1899 elections

| | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ |
| D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ |
| D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ Re-elected | D$_{21}$ Re-elected | D$_{22}$ Re-elected | D$_{23}$ Re-elected | D$_{24}$ Hold | D$_{25}$ Gain |
| R$_{50}$ Gain | SR$_3$ Re-elected | SR$_2$ | SR$_1$ | S$_1$ | S$_2$ | P$_1$ | P$_2$ | P$_3$ | P$_4$ |
| R$_{49}$ Gain | R$_{48}$ Gain | R$_{47}$ Gain | R$_{46}$ Gain | R$_{45}$ Gain | R$_{44}$ Gain | R$_{43}$ Hold | V$_1$ D Loss | V$_2$ D Loss | V$_3$ D Loss |
| V$_3$ D Loss ||||||
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{42}$ Re-elected | V$_6$ R Loss | V$_5$ SR Loss | V$_4$ P Loss |
| R$_{36}$ Re-elected | R$_{37}$ Re-elected | R$_{38}$ Re-elected | R$_{39}$ Re-elected | R$_{40}$ Re-elected | R$_{41}$ Re-elected | R$_{42}$ Re-elected | V$_6$ R Loss | V$_5$ SR Loss | V$_4$ P Loss |
| R$_{35}$ Re-elected | R$_{34}$ Re-elected | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ | R$_{26}$ |
| R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ |
| R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ |
| | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ |

## 1900 and 1901 elections

| | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ |
| D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ |
| D$_{16}$ Re-elected | D$_{17}$ Re-elected | D$_{18}$ Re-elected | D$_{19}$ Re-elected | D$_{20}$ Re-elected | D$_{21}$ Hold | D$_{22}$ Hold | D$_{23}$ Hold | D$_{24}$ Hold | D$_{25}$ Hold |
| SR$_1$ | S$_1$ | S$_2$ | P$_1$ | P$_2$ | P$_3$ | P$_4$ | D$_{28}$ Gain | D$_{27}$ Gain | D$_{26}$ Gain |
| SR$_2$ | SR$_3$ Gain | R$_{48}$ Gain | R$_{47}$ Re-elected | R$_{46}$ Re-elected | R$_{45}$ Re-elected | R$_{44}$ Hold | R$_{43}$ Re-elected | V$_5$ D Loss | V$_1$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{43}$ Re-elected | V$_4$ R Loss | V$_2$ |
| R$_{36}$ Re-elected | R$_{37}$ Re-elected | R$_{38}$ Re-elected | R$_{39}$ Re-elected | R$_{40}$ Re-elected | R$_{41}$ Re-elected | R$_{42}$ Hold | R$_{43}$ Re-elected | V$_4$ R Loss | V$_3$ |
| R$_{35}$ Re-elected | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ | R$_{26}$ |
| R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ |
| R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ |
| | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ |

## 1902 and 1903 elections

| | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ |
| D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ |
| D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ Re-elected | D$_{23}$ Re-elected | D$_{24}$ Re-elected | D$_{25}$ Hold |
| R$_{54}$ Gain | R$_{55}$ Gain | V$_1$ D Loss | D$_{32}$ Gain | D$_{31}$ Gain | D$_{30}$ Gain | D$_{29}$ Gain | D$_{28}$ Gain | D$_{27}$ Hold | D$_{26}$ Hold |
| R$_{53}$ Gain | R$_{52}$ Gain | R$_{51}$ Hold | R$_{50}$ Hold | R$_{49}$ Re-elected | R$_{48}$ Re-elected | R$_{47}$ Re-elected | R$_{46}$ Re-elected | R$_{45}$ Re-elected | V$_2$ |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{44}$ Re-elected | V$_2$ |
| R$_{36}$ | R$_{37}$ | R$_{38}$ Re-elected | R$_{29}$ Re-elected | R$_{40}$ Re-elected | R$_{41}$ Re-elected | R$_{42}$ Re-elected | R$_{43}$ Re-elected | R$_{44}$ Re-elected | V$_3$ |
| R$_{35}$ | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ | R$_{26}$ |
| R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ |
| R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ |
| | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ |

## 1904 and 1905 elections

| | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ |
| D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ |
| D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ |
| R$_{53}$ Hold | R$_{54}$ Hold | R$_{55}$ Hold | R$_{56}$ Gain | D$_{31}$ Gain | D$_{30}$ Re-elected | D$_{29}$ Re-elected | D$_{28}$ Re-elected | D$_{27}$ Re-elected | D$_{26}$ |
| R$_{52}$ Hold | R$_{51}$ Hold | R$_{50}$ Hold | R$_{49}$ Hold | R$_{48}$ Re-elected | R$_{47}$ Re-elected | R$_{46}$ Re-elected | R$_{45}$ Re-elected | R$_{44}$ Re-elected | V$_1$ D Loss |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{44}$ Re-elected | V$_2$ D Loss |
| R$_{36}$ Re-elected | R$_{37}$ Re-elected | R$_{38}$ Re-elected | R$_{39}$ Re-elected | R$_{40}$ Re-elected | R$_{41}$ Re-elected | R$_{42}$ Re-elected | R$_{43}$ Re-elected | R$_{44}$ Re-elected | V$_3$ R Loss |
| R$_{35}$ Re-elected | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ | R$_{26}$ |
| R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ |
| R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ |
| | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ |

## 1906 and 1907 elections

| | | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ |
| D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ | D$_6$ |
| D$_{16}$ | D$_{17}$ | D$_{18}$ | D$_{19}$ Re-elected | D$_{20}$ Re-elected | D$_{21}$ Re-elected | D$_{22}$ Re-elected | D$_{23}$ Re-elected | D$_{24}$ Re-elected | D$_{25}$ Re-elected |
| R$_{56}$ Hold | R$_{57}$ Gain | R$_{58}$ Gain | R$_{59}$ Gain | R$_{60}$ Gain | V$_1$ R Loss | V$_2$ D Loss | D$_{28}$ Hold | D$_{27}$ Hold | D$_{26}$ Hold |
| R$_{55}$ Hold | R$_{54}$ Hold | R$_{53}$ Hold | R$_{52}$ Hold | R$_{51}$ Re-elected | R$_{50}$ Re-elected | R$_{49}$ Re-elected | R$_{48}$ Re-elected | R$_{47}$ Re-elected | R$_{46}$ Re-elected |
| Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | R$_{45}$ Re-elected |
| R$_{36}$ | R$_{37}$ | R$_{38}$ | R$_{39}$ | R$_{40}$ | R$_{41}$ | R$_{42}$ | R$_{43}$ Re-elected | R$_{44}$ Re-elected | R$_{45}$ Re-elected |
| R$_{35}$ | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ | R$_{26}$ |
| R$_{16}$ | R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ |
| R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ | R$_6$ |
| | | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ |

## 1908 and 1909 elections

| | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ |
| D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ |
| D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ Re-elected | D$_{21}$ Re-elected | D$_{22}$ Re-elected | D$_{23}$ Re-elected | D$_{24}$ Re-elected | D$_{25}$ Re-elected | D$_{26}$ Re-elected |
| R$_{57}$ Hold | R$_{58}$ Hold | R$_{59}$ Gain | V$_1$ R loss | V$_2$ D loss | D$_{31}$ Gain | D$_{30}$ Gain | D$_{29}$ Hold | D$_{28}$ Hold | D$_{27}$ Hold |
| R$_{56}$ Hold | R$_{55}$ Hold | R$_{54}$ Hold | R$_{53}$ Re-elected | R$_{52}$ Re-elected | R$_{51}$ Re-elected | R$_{50}$ Re-elected | R$_{49}$ Re-elected | R$_{48}$ Re-elected | R$_{47}$ Re-elected |
| Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | Majority due to vacancies→ | R$_{46}$ Re-elected |
| R$_{37}$ | R$_{38}$ | R$_{39}$ | R$_{40}$ | R$_{41}$ | R$_{42}$ | R$_{43}$ | R$_{44}$ Re-elected | R$_{45}$ Re-elected | R$_{46}$ Re-elected |
| R$_{36}$ | R$_{35}$ | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ |
| R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ |
| R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ |
| | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ |

## 1910 and 1911 elections

Although the 17th Amendment was not passed until 1913, some states elected their Senators directly before its passage. Oregon pioneered direct election and experimented with different measures over several years until it succeeded in 1907. Soon after, Nebraska followed suit and laid the foundation for other states to adopt measures reflecting the people's will. By 1912, as many as 29 states elected senators either as nominees of their party's primary or in conjunction with a general election.
| | | | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ |
| D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ | D$_8$ | D$_7$ |
| D$_{17}$ | D$_{18}$ | D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ |
| D$_{36}$ Gain | D$_{35}$ Gain | D$_{34}$ Gain | D$_{33}$ Gain | D$_{32}$ Hold | D$_{31}$ Hold | D$_{30}$ Re-elected | D$_{29}$ Re-elected | D$_{28}$ Re-elected | D$_{27}$ |
| D$_{37}$ Gain | D$_{38}$ Gain | D$_{39}$ Gain | D$_{40}$ Gain | V$_1$ D Loss | V$_2$ R Loss | R$_{50}$ Hold | R$_{49}$ Hold | R$_{48}$ Hold | R$_{47}$ Hold |
| Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | Majority → | R$_{46}$ Hold |
| R$_{37}$ Re-elected | R$_{38}$ Re-elected | R$_{39}$ Re-elected | R$_{40}$ Re-elected | R$_{41}$ Re-elected | R$_{42}$ Re-elected | R$_{43}$ Re-elected | R$_{44}$ Re-elected | R$_{45}$ Re-elected | R$_{46}$ Hold |
| R$_{36}$ Re-elected | R$_{35}$ | R$_{34}$ | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ | R$_{28}$ | R$_{27}$ |
| R$_{17}$ | R$_{18}$ | R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ |
| R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ | R$_8$ | R$_7$ |
| | | | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ |

## 1912 and 1913 elections

| | | D$_1$ | D$_2$ | D$_3$ | D$_4$ | D$_5$ | D$_6$ | D$_7$ | D$_8$ |
| D$_{18}$ | D$_{17}$ | D$_{16}$ | D$_{15}$ | D$_{14}$ | D$_{13}$ | D$_{12}$ | D$_{11}$ | D$_{10}$ | D$_9$ |
| D$_{19}$ | D$_{20}$ | D$_{21}$ | D$_{22}$ | D$_{23}$ | D$_{24}$ | D$_{25}$ | D$_{26}$ | D$_{27}$ | D$_{28}$ |
| D$_{38}$ Hold | D$_{37}$ Hold | D$_{36}$ Hold | D$_{35}$ Re-elected | D$_{34}$ Re-elected | D$_{33}$ Re-elected | D$_{32}$ Re-elected | D$_{31}$ Re-elected | D$_{30}$ | D$_{29}$ |
| D$_{39}$ Hold | D$_{40}$ Hold | D$_{41}$ Gain | D$_{42}$ Gain | D$_{43}$ Gain | D$_{44}$ Gain | D$_{45}$ Gain | D$_{46}$ Gain | V$_1$ | V$_2$ D Loss |
| Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | Majority with vacancies → | D$_{47}$ Gain |
| R$_{39}$ Re-elected | R$_{40}$ Hold | R$_{41}$ Hold | R$_{42}$ Hold | R$_{43}$ Hold | R$_{44}$ Gain | R$_{45}$ Gain | D$_{47}$ Gain | V$_4$ R Loss | V$_3$ R Loss |
| R$_{38}$ Re-elected | R$_{37}$ Re-elected | R$_{36}$ Re-elected | R$_{35}$ Re-elected | R$_{34}$ Re-elected | R$_{33}$ | R$_{32}$ | R$_{31}$ | R$_{30}$ | R$_{29}$ |
| R$_{19}$ | R$_{20}$ | R$_{21}$ | R$_{22}$ | R$_{23}$ | R$_{24}$ | R$_{25}$ | R$_{26}$ | R$_{27}$ | R$_{28}$ |
| R$_{18}$ | R$_{17}$ | R$_{16}$ | R$_{15}$ | R$_{14}$ | R$_{13}$ | R$_{12}$ | R$_{11}$ | R$_{10}$ | R$_9$ |
| | | R$_1$ | R$_2$ | R$_3$ | R$_4$ | R$_5$ | R$_6$ | R$_7$ | R$_8$ |

## See also elections

* List of elections in the United States