# 2006 United States state legislative elections

The 2006 United States state legislative elections were held on November 7, 2006, halfway through President George W. Bush's second term in office. This election was a wave elections in the United States election, and saw Democrats simultaneously reclaim both houses of Congress and pick up six governorships. Elections were held for 90 legislative chambers, with all states but Louisiana, Mississippi, New Jersey, and Virginia holding elections in at least one house. Kansas, New Mexico, and South Carolina held elections for their lower, but not upper house. Four territorial chambers in three territories and the District of Columbia were up, including the newly created territorial legislature in the U.S. Virgin Islands.
Democrats flipped ten legislative chambers. Democrats gained control of the Oregon House of Representatives, the Minnesota House of Representatives, both houses of the Iowa General Assembly, and both houses of the New Hampshire General Court for the first time since 1875, giving them complete legislative control over those states. The Iowa Senate was previously tied. Democrats also won majorities in the Wisconsin Senate, the Michigan House of Representatives, the Pennsylvania House of Representatives, and the Indiana House of Representatives, turning those legislatures into split bodies. Additionally, a Democratic-led coalition was created in the Alaska Senate, which was previously a Republican majority. Democrats won a majority of state legislative chambers for the first time since 1995.
Conversely, Republicans gained control of the Montana House of Representatives with the lone Constitution Party representative voting for Republican control of that body.
Democrats won a trifecta in Iowa for the first time since 1967, and in New Hampshire since 1875.

## Summary table

Regularly-scheduled elections were held in 90 of the 99 state legislative chambers in the United States. Nationwide, regularly-scheduled elections were held for 6,343 of the 7,383 legislative seats. Many legislative chambers held elections for all seats, but some legislative chambers that use staggered elections held elections for only a portion of the total seats in the chamber. The chambers not up for election either hold regularly-scheduled elections in odd-numbered years, or have four-year terms and hold all regularly-scheduled elections in presidential midterm election years.
Note that this table only covers regularly-scheduled elections; additional special elections took place concurrently with these regularly-scheduled elections.
| State | Upper House | Upper House | Upper House | Upper House | Lower House | Lower House | Lower House | Lower House |
| State | Seats up | Total | % up | Term | Seats up | Total | % up | Term |
| Alabama | 35 | 35 | 35 | 4 | 105 | 105 | 105 | 4 |
| Alaska | 19 | 20 | 95 | 4 | 40 | 40 | 100 | 2 |
| Arizona | 30 | 30 | 100 | 2 | 60 | 60 | 100 | 2 |
| Arkansas | 35 | 35 | 100 | 2/4 | 100 | 100 | 100 | 2 |
| California | 20 | 40 | 50 | 4 | 80 | 80 | 100 | 2 |
| Colorado | 18 | 35 | 51 | 4 | 65 | 65 | 100 | 2 |
| Connecticut | 36 | 36 | 100 | 2 | 151 | 151 | 100 | 2 |
| Delaware | 21 | 21 | 100 | 2/4 | 41 | 41 | 100 | 2 |
| Florida | 40 | 40 | 100 | 2/4 | 120 | 120 | 100 | 2 |
| Georgia | 56 | 56 | 100 | 2 | 180 | 180 | 100 | 2 |
| Hawaii | 25 | 25 | 100 | 2/4 | 51 | 51 | 100 | 2 |
| Idaho | 35 | 35 | 100 | 2 | 70 | 70 | 100 | 2 |
| Illinois | 59 | 59 | 100 | 2/4 | 118 | 118 | 100 | 2 |
| Indiana | 25 | 50 | 50 | 4 | 100 | 100 | 100 | 2 |
| Iowa | 25 | 50 | 50 | 4 | 100 | 100 | 100 | 2 |
| Kansas | 0 | 40 | 0 | 4 | 125 | 125 | 100 | 2 |
| Kentucky | 19 | 38 | 50 | 4 | 100 | 100 | 100 | 2 |
| Louisiana | 0 | 39 | 0 | 4 | 0 | 105 | 0 | 4 |
| Maine | 35 | 35 | 100 | 2 | 151 | 151 | 100 | 2 |
| Maryland | 47 | 47 | 47 | 4 | 141 | 141 | 141 | 4 |
| Massachusetts | 40 | 40 | 100 | 2 | 160 | 160 | 100 | 2 |
| Michigan | 38 | 38 | 38 | 4 | 110 | 110 | 100 | 2 |
| Minnesota | 67 | 67 | 100 | 2/4 | 134 | 134 | 100 | 2 |
| Mississippi | 0 | 52 | 0 | 4 | 0 | 122 | 0 | 4 |
| Missouri | 17 | 34 | 50 | 4 | 163 | 163 | 100 | 2 |
| Montana | 25 | 50 | 50 | 4 | 100 | 100 | 100 | 2 |
| Nebraska | 25 | 49 | 51 | 4 | N/A (unicameral) | N/A (unicameral) | N/A (unicameral) | N/A (unicameral) |
| Nevada | 10 | 21 | 48 | 4 | 42 | 42 | 100 | 2 |
| New Hampshire | 24 | 24 | 100 | 2 | 400 | 400 | 100 | 2 |
| New Jersey | 0 | 40 | 0 | 2/4 | 0 | 80 | 0 | 2 |
| New Mexico | 0 | 42 | 0 | 4 | 70 | 70 | 100 | 2 |
| New York | 62 | 62 | 100 | 2 | 150 | 150 | 100 | 2 |
| North Carolina | 50 | 50 | 100 | 2 | 120 | 120 | 100 | 2 |
| North Dakota | 23 | 47 | 49 | 4 | 47 | 94 | 50 | 4 |
| Ohio | 16 | 33 | 48 | 4 | 99 | 99 | 100 | 2 |
| Oklahoma | 24 | 48 | 50 | 4 | 101 | 101 | 100 | 2 |
| Oregon | 15 | 30 | 50 | 4 | 60 | 60 | 100 | 2 |
| Pennsylvania | 25 | 50 | 50 | 4 | 203 | 203 | 100 | 2 |
| Rhode Island | 38 | 38 | 100 | 2 | 75 | 75 | 100 | 2 |
| South Carolina | 0 | 46 | 0 | 4 | 124 | 124 | 100 | 2 |
| South Dakota | 35 | 35 | 100 | 2 | 70 | 70 | 100 | 2 |
| Tennessee | 16 | 33 | 48 | 4 | 99 | 99 | 100 | 2 |
| Texas | 16 | 31 | 52 | 2/4 | 150 | 150 | 100 | 2 |
| Utah | 15 | 29 | 52 | 4 | 75 | 75 | 100 | 2 |
| Vermont | 30 | 30 | 100 | 2 | 150 | 150 | 100 | 2 |
| Virginia | 0 | 40 | 0 | 4 | 0 | 100 | 0 | 2 |
| Washington | 25 | 49 | 51 | 4 | 98 | 98 | 100 | 2 |
| West Virginia | 17 | 34 | 50 | 4 | 100 | 100 | 100 | 2 |
| Wisconsin | 16 | 33 | 48 | 4 | 99 | 99 | 100 | 2 |
| Wyoming | 15 | 30 | 50 | 4 | 60 | 60 | 100 | 2 |
| Total | 1280 | 1971 | 65 | N/A | 4595 | 5411 | 85 | N/A |

## Electoral predictions

Early in the election cycle, analysts considered Democrats to have an advantage over Republicans, despite both parties controlling a similar number of competitive legislative chambers. The unpopularity of President George W. Bush, as well as a number of Republican governors, made the party vulnerable to losses in legislatures across the country, with Democrats looking to build on the gains they made in the 2004 elections. In addition to targeting many Republican-held chambers considered imminently vulnerable in 2006, Democrats also sought to make gains in more solidly-Republican chambers, such as the New York State Senate and Ohio House of Representatives, with the hopes of flipping them in 2008. As the cycle progressed, local political factors shifted projections for multiple chambers, usually in the Democrats' favor.
Ratings are designated as follows:
* "Tossup": Competitive, no advantage
* "Lean": Competitive, slight advantage
* "Likely": Not competitive, but opposition could make significant gains
* "Safe": Not competitive at all
| State | Chamber | Last election | Rothenberg Nov. 4, 2006 | Result |
| Alabama | Senate | D 25–10 | Likely D | D 23–12 |
| Alabama | House of Representatives | D 63–42 | Likely D | D 62–43 |
| Alaska | Senate | R 12–8 | Likely R | Coal. 15–5 |
| Alaska | House of Representatives | R 26–14 | Safe R | R 23–17 |
| Arizona | Senate | R 18–12 | Safe R | R 17–13 |
| Arizona | House of Representatives | R 38–22 | Safe R | R 33–27 |
| Arkansas | Senate | D 27–8 | Safe D | D 27–8 |
| Arkansas | House of Representatives | D 72–28 | Safe D | D 72–28 |
| California | State Senate | D 25–15 | Safe D | D 25–15 |
| California | State Assembly | D 48–32 | Safe D | D 48–32 |
| Colorado | Senate | D 18–17 | Lean D | D 20–15 |
| Colorado | House of Representatives | D 35–30 | Tossup | D 39–26 |
| Connecticut | State Senate | D 24–12 | Safe D | D 24–12 |
| Connecticut | House of Representatives | D 99–52 | Safe D | D 107–44 |
| Delaware | Senate | D 13–8 | Safe D | D 13–8 |
| Delaware | House of Representatives | R 26–15 | Likely R | R 23–18 |
| Florida | Senate | R 26–14 | Safe R | R 26–14 |
| Florida | House of Representatives | R 84–36 | Safe R | R 78–42 |
| Georgia | State Senate | R 34–22 | Safe R | R 34–22 |
| Georgia | House of Representatives | R 99–80–1 | Safe R | R 106–74 |
| Hawaii | Senate | D 20–5 | Safe D | D 20–5 |
| Hawaii | House of Representatives | D 41–10 | Safe D | D 43–8 |
| Idaho | Senate | R 28–7 | Safe R | R 28–7 |
| Idaho | House of Representatives | R 57–13 | Safe R | R 51–19 |
| Illinois | Senate | D 31–27–1 | Safe D | D 37–22 |
| Illinois | House of Representatives | D 65–53 | Safe D | D 66–52 |
| Indiana | Senate | R 33–17 | Safe R | R 33–17 |
| Indiana | House of Representatives | R 52–48 | Tossup | D 51–49 |
| Iowa | Senate | 25–25 | Tossup | D 30–20 |
| Iowa | House of Representatives | R 51–49 | Tossup | D 54–46 |
| Kansas | House of Representatives | R 83–42 | Safe R | R 78–47 |
| Kentucky | Senate | R 22–15 | Likely R | R 21–16–1 |
| Kentucky | House of Representatives | D 57–43 | Likely D | D 61–39 |
| Maine | Senate | D 18–17 | Tossup | D 18–17 |
| Maine | House of Representatives | D 76–73–1–1 | Tossup | D 90–59–2 |
| Maryland | Senate | D 33–14 | Safe D | D 33–14 |
| Maryland | House of Delegates | D 98–43 | Safe D | D 104–37 |
| Massachusetts | Senate | D 34–6 | Safe D | D 35–5 |
| Massachusetts | House of Representatives | D 137–23 | Safe D | D 141–19 |
| Michigan | Senate | R 22–16 | Lean R | R 21–17 |
| Michigan | House of Representatives | R 58–52 | Lean R | D 58–52 |
| Minnesota | Senate | D 35–31–1 | Safe D | D 44–23 |
| Minnesota | House of Representatives | R 68–66 | Tossup | D 85–49 |
| Missouri | Senate | R 23–11 | Likely R | R 21–13 |
| Missouri | House of Representatives | R 97–66 | Likely R | R 92–71 |
| Montana | Senate | D 27–23 | Lean D | D 26–24 |
| Montana | House of Representatives | D 50–50 | Tossup | R 50–49–1 |
| Nevada | Senate | R 12–9 | Lean R | R 11–10 |
| Nevada | Assembly | D 26–16 | Safe D | D 27–15 |
| New Hampshire | Senate | R 16–8 | Lean R | D 14–10 |
| New Hampshire | House of Representatives | R 249–151 | Safe R | D 239–160–1 |
| New Mexico | House of Representatives | D 42–28 | Safe D | D 42–28 |
| New York | State Senate | R 35–27 | Likely R | R 33–29 |
| New York | State Assembly | D 104–46 | Safe D | D 106–42–1–1 |
| North Carolina | Senate | D 29–21 | Likely D | D 31–19 |
| North Carolina | House of Representatives | D 63–57 | Lean D | D 68–52 |
| North Dakota | Senate | R 32–15 | Safe R | R 26–21 |
| North Dakota | House of Representatives | R 67–27 | Safe R | R 61–33 |
| Ohio | Senate | R 22–11 | Likely R | R 21–12 |
| Ohio | House of Representatives | R 61–38 | Lean R | R 53–46 |
| Oklahoma | Senate | D 26–22 | Tossup | D 24–24 |
| Oklahoma | House of Representatives | R 57–44 | Safe R | R 57–44 |
| Oregon | State Senate | D 17–13 | Likely D | D 19–11 |
| Oregon | House of Representatives | R 33–27 | Tossup | D 31–29 |
| Pennsylvania | State Senate | R 30–20 | Likely R | R 29–21 |
| Pennsylvania | House of Representatives | R 110–93 | Tossup | D 102–101 |
| Rhode Island | Senate | D 33–5 | Safe D | D 33–5 |
| Rhode Island | House of Representatives | D 59–16 | Safe D | D 60–15 |
| South Carolina | House of Representatives | R 74–50 | Safe R | R 73–51 |
| South Dakota | Senate | R 25–10 | Likely R | R 20–15 |
| South Dakota | House of Representatives | R 50–20 | Safe R | R 50–20 |
| Tennessee | Senate | R 17–16 | Lean R | R 17–16 |
| Tennessee | House of Representatives | D 53–46 | Lean D | D 53–46 |
| Texas | Senate | R 19–12 | Safe R | R 20–11 |
| Texas | House of Representatives | R 87–63 | Safe R | R 81–69 |
| Utah | State Senate | R 21–8 | Safe R | R 21–8 |
| Utah | House of Representatives | R 56–19 | Safe R | R 55–20 |
| Vermont | Senate | D 21–9 | Safe D | D 23–7 |
| Vermont | House of Representatives | D 83–60–6–1 | Safe D | D 93–49–6–2 |
| Washington | State Senate | D 26–23 | Lean D | D 32–17 |
| Washington | House of Representatives | D 55–43 | Lean D | D 62–36 |
| West Virginia | Senate | D 21–13 | Safe D | D 23–11 |
| West Virginia | House of Delegates | D 68–32 | Likely D | D 72–28 |
| Wisconsin | Senate | R 19–14 | Lean R | D 18–15 |
| Wisconsin | State Assembly | R 60–39 | Safe R | R 52–47 |
| Wyoming | Senate | R 23–7 | Safe R | R 23–7 |
| Wyoming | House of Representatives | R 46–14 | Safe R | R 43–17 |

## Maps

* Upper house seats by party holding majority in each state Democratic 50–60% 60–70% 70–80% 80–90% Republican 50–60% 60–70% 70–80% 80–90% Tie 50%
* Lower house seats by party holding majority in each state Democratic 50–60% 60–70% 70–80% 80–90% Republican 50–60% 60–70% 70–80%
* Net changes to upper house seats after the 2006 elections +1 Dem seat +2 Dem seats +4–5 Dem seats +6 Dem seats +1 Rep seat +2 Rep seats
* Net changes to lower house seats after the 2006 elections +1 Dem seat +2 Dem seats +3–5 Dem seats +6–88 Dem seats +1 Const. seat +5 Rep seats

## State summaries
### Alabama

All of the seats of the Alabama House of Representatives and half of the Alabama Senate were up for election. Democrats maintained control of both state legislative chambers.
Alabama Senate :
| Party | Party | Before | After | Change |
| | Democratic | 25 | 23 | 2 |
| | Republican | 10 | 12 | 2 |
| Total | Total | 35 | 35 | |
Alabama House of Representatives :
| Party | Party | Before | After |
| | Democratic | 62 | 62 |
| | Republican | 43 | 43 |
| Total | Total | 105 | 105 |

### Alaska

All of the seats of the Alaska House of Representatives and half of the Alaska Senate were up for election. A Democratic-led coalition established control of the Senate while Republicans maintained control of the House.
Alaska Senate :
| Party | Party | Before | After | Change |
| | Democratic | 8 | 9 | 1 |
| | Republican | 12 | 6 | 1 |
| | Republican | 12 | 5 | 1 |
| Total | Total | 20 | 20 | |
Alaska House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 26 | 23 | 3 |
| | Democratic | 14 | 17 | 3 |
| Total | Total | 40 | 40 | |

### Arizona

All of the seats of the Arizona Legislature were up for election. Republicans maintained control of both state legislative chambers.
Arizona Senate :
| Party | Party | Before | After | Change |
| | Republican | 18 | 17 | 1 |
| | Democratic | 12 | 13 | 1 |
| Total | Total | 30 | 30 | |
Arizona House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 39 | 33 | 6 |
| | Democratic | 21 | 27 | 6 |
| Total | Total | 60 | 60 | |

### Arkansas

All of the seats of the Arkansas House of Representatives and half of the Arkansas Senate were up for election. Democrats maintained control of both state legislative chambers.
Arkansas Senate :
| Party | Party | Before | After |
| | Democratic | 27 | 27 |
| | Republican | 8 | 8 |
| Total | Total | 35 | 35 |
Arkansas House of Representatives :
| Party | Party | Before | After |
| | Democratic | 72 | 72 |
| | Republican | 28 | 28 |
| Total | Total | 100 | 100 |

### California

All of the seats of the California House of Representatives and half of the California Senate were up for election. Democrats maintained control of both state legislative chambers.
California State Senate :
| Party | Party | Before | After |
| | Democratic | 25 | 25 |
| | Republican | 15 | 15 |
| Total | Total | 40 | 40 |
California State Assembly :
| Party | Party | Before | After |
| | Democratic | 48 | 48 |
| | Republican | 32 | 32 |
| Total | Total | 80 | 80 |

### Colorado

All of the seats of the Colorado House of Representatives and half of the Colorado Senate were up for election. Democrats maintained control of both state legislative chambers.
Colorado Senate :
| Party | Party | Before | After | Change |
| | Democratic | 18 | 20 | 2 |
| | Republican | 17 | 15 | 2 |
| Total | Total | 35 | 35 | |
Colorado House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 35 | 39 | 4 |
| | Republican | 30 | 26 | 4 |
| Total | Total | 65 | 65 | |

### Connecticut

All of the seats of the Connecticut Legislature were up for election. Democrats maintained control of both state legislative chambers.
Connecticut State Senate :
| Party | Party | Before | After |
| | Democratic | 24 | 24 |
| | Republican | 12 | 12 |
| Total | Total | 36 | 36 |
Connecticut House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 99 | 107 | 8 |
| | Republican | 52 | 44 | 8 |
| Total | Total | 151 | 151 | |

### Delaware

All of the seats of the Delaware House of Representatives and half of the Delaware Senate were up for election. Democrats maintained control of the Senate while Republicans maintained control of the House.
Delaware Senate :
| Party | Party | Before | After |
| | Democratic | 13 | 13 |
| | Republican | 8 | 8 |
| Total | Total | 21 | 21 |
Delaware House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 26 | 23 | 3 |
| | Democratic | 15 | 18 | 3 |
| Total | Total | 41 | 41 | |

### Florida

All of the seats of the Florida House of Representatives and half of the Florida Senate were up for election. Republicans maintained control of both state legislative chambers.
Florida Senate :
| Party | Party | Before | After |
| | Republican | 26 | 26 |
| | Democratic | 14 | 14 |
| Total | Total | 40 | 40 |
Florida House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 85 | 78 | 7 |
| | Democratic | 35 | 42 | 7 |
| Total | Total | 120 | 120 | |

### Georgia

All of the seats of the Georgia Legislature were up for election. Republicans maintained control of both state legislative chambers.
Georgia State Senate :
| Party | Party | Before | After |
| | Republican | 34 | 34 |
| | Democratic | 22 | 22 |
| Total | Total | 56 | 56 |
Georgia House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 101 | 106 | 5 |
| | Democratic | 78 | 74 | 4 |
| | Independent | 1 | 0 | 1 |
| Total | Total | 180 | 180 | |

### Hawaii

All of the seats of the Hawaii House of Representatives and half of the Hawaii Senate were up for election. Democrats maintained control of both state legislative chambers.
Hawaii Senate :
| Party | Party | Before | After |
| | Democratic | 20 | 20 |
| | Republican | 5 | 5 |
| Total | Total | 25 | 25 |
Hawaii House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 41 | 43 | 2 |
| | Republican | 10 | 8 | 2 |
| Total | Total | 51 | 51 | |

### Idaho

All of the seats of the Idaho Legislature were up for election. Republicans maintained control of both state legislative chambers.
Idaho Senate :
| Party | Party | Before | After |
| | Republican | 28 | 28 |
| | Democratic | 7 | 7 |
| Total | Total | 35 | 35 |
Idaho House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 57 | 51 | 6 |
| | Democratic | 13 | 19 | 6 |
| Total | Total | 70 | 70 | |

### Illinois

All of the seats of the Illinois House of Representatives and 2/3rds of the Illinois Senate were up for election. Democrats maintained control of both state legislative chambers.
Illinois Senate :
| Party | Party | Before | After | Change |
| | Democratic | 31 | 37 | 6 |
| | Republican | 27 | 22 | 5 |
| | Independent | 1 | 0 | 1 |
| Total | Total | 59 | 59 | |
Illinois House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 65 | 66 | 1 |
| | Republican | 53 | 52 | 1 |
| Total | Total | 118 | 118 | |

### Indiana

All of the seats of the Indiana House of Representatives and half of the Indiana Senate were up for election. Republicans maintained control of the Senate while Democrats gained control of the House of Representatives.
Indiana Senate :
| Party | Party | Before | After |
| | Republican | 33 | 33 |
| | Democratic | 17 | 17 |
| Total | Total | 50 | 50 |
Indiana House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 48 | 51 | 3 |
| | Republican | 52 | 49 | 3 |
| Total | Total | 100 | 100 | |

### Iowa

All of the seats of the Iowa House of Representatives and half of the Iowa Senate were up for election. Democrats gained control of both state legislative chambers.
Iowa Senate :
| Party | Party | Before | After | Change |
| | Democratic | 25 | 30 | 5 |
| | Republican | 25 | 20 | 5 |
| Total | Total | 50 | 50 | |
Iowa House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 49 | 54 | 5 |
| | Republican | 51 | 46 | 5 |
| Total | Total | 100 | 100 | |

### Kansas

All of the seats of the Kansas House of Representatives were up for election. Republicans maintained control of the House.
Kansas House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 83 | 78 | 5 |
| | Democratic | 42 | 47 | 5 |
| Total | Total | 125 | 125 | |

### Kentucky

All of the seats of the Kentucky House of Representatives and half of the Kentucky Senate were up for election. Republicans maintained control of the Senate and Democrats maintained control of the House of Representatives.
Kentucky Senate :
| Party | Party | Before | After |
| | Republican | 21 | 21 |
| | Independent | 1 | 1 |
| | Democratic | 16 | 16 |
| Total | Total | 38 | 38 |
Kentucky House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 57 | 61 | 4 |
| | Republican | 43 | 39 | 4 |
| Total | Total | 100 | 100 | |

### Maine

All of the seats of the Maine Legislature were up for election. Democrats maintained control of both state legislative chambers.
Maine Senate :
| Party | Party | Before | After |
| | Democratic | 18 | 18 |
| | Republican | 17 | 17 |
| Total | Total | 35 | 35 |
Maine House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 76 | 90 | 14 |
| | Republican | 73 | 59 | 14 |
| | Independent | 1 | 2 | 1 |
| | Green | 1 | 0 | 1 |
| Total | Total | 151 | 151 | |

### Maryland

All of the seats of the Maryland General Assembly were up for election. Democrats maintained control of both state legislative chambers.
Maryland Senate :
| Party | Party | Before | After |
| | Democratic | 33 | 33 |
| | Republican | 14 | 14 |
| Total | Total | 47 | 47 |
Maryland House of Delegates :
| Party | Party | Before | After | Change |
| | Democratic | 98 | 104 | 6 |
| | Republican | 43 | 37 | 6 |
| Total | Total | 160 | 160 | |

### Massachusetts

All of the seats of the Massachusetts Legislature were up for election. Democrats maintained control of both state legislative chambers.
Massachusetts Senate :
| Party | Party | Before | After | Change |
| | Democratic | 34 | 35 | 1 |
| | Republican | 6 | 5 | 1 |
| Total | Total | 40 | 40 | |
Massachusetts House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 138 | 141 | 3 |
| | Republican | 21 | 19 | 2 |
| | Independent | 1 | 0 | 1 |
| Total | Total | 160 | 160 | |

### Michigan

All of the seats of the Michigan Legislature were up for election. Republicans maintained control of the Senate while Democrats won control of the House of Representatives.
Michigan Senate :
| Party | Party | Before | After | Change |
| | Republican | 22 | 21 | 1 |
| | Democratic | 16 | 17 | 1 |
| Total | Total | 38 | 38 | |
Michigan House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 52 | 58 | 6 |
| | Republican | 58 | 52 | 6 |
| Total | Total | 110 | 110 | |

### Minnesota

All of the seats of the Minnesota Legislature were up. Democrats maintained control of the Senate and won control of the House.
Minnesota Senate :
| Party | Party | Before | After | Change |
| | Democratic (DFL) | 38 | 44 | 6 |
| | Republican | 29 | 23 | 6 |
| Total | Total | 67 | 67 | |
Minnesota House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic (DFL) | 66 | 85 | 19 |
| | Republican | 68 | 49 | 19 |
| Total | Total | 134 | 134 | |

### Missouri

All of the seats of the Missouri House of Representatives and half of the Missouri Senate were up for election. Republicans maintained control of both state legislative chambers.
Missouri Senate :
| Party | Party | Before | After | Change |
| | Republican | 23 | 21 | 2 |
| | Democratic | 11 | 13 | 2 |
| Total | Total | 34 | 34 | |
Missouri House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 97 | 92 | 5 |
| | Democratic | 66 | 71 | 5 |
| Total | Total | 163 | 163 | |

### Montana

All of the seats of the Montana House of Representatives and half of the Montana Senate were up for election. Democrats maintained control of the Senate and Republicans flipped control of the House.
Montana Senate :
| Party | Party | Before | After | Change |
| | Democratic | 27 | 26 | 1 |
| | Republican | 23 | 24 | 1 |
| Total | Total | 50 | 50 | |
Montana House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 50 | 50 | |
| | Constitution | 0 | 1 | 1 |
| | Democratic | 50 | 49 | 1 |
| Total | Total | 100 | 100 | |

### Nebraska

Nebraska is the only U.S. state with a unicameral legislature; half of the seats of the Nebraska Legislature were up for election. Nebraska is also unique in that its legislature is officially non-partisan and holds non-partisan elections, although the Democratic and Republican parties each endorse legislative candidates. Republicans maintained control.
Nebraska Legislature :
| Party | Party | Before | After | Change |
| | Republican | 32 | 30 | 2 |
| | Democratic | 15 | 17 | 2 |
| | Independent | 2 | 2 | |
| Total | Total | 49 | 49 | |

### Nevada

All of the seats of the Nevada House of Representatives and half of the Nevada Senate were up for election. Democrats maintained control of the House while Republicans maintained control of the Senate.
Nevada Senate :
| Party | Party | Before | After | Change |
| | Republican | 12 | 11 | 1 |
| | Democratic | 9 | 10 | 1 |
| Total | Total | 21 | 21 | |
Nevada Assembly :
| Party | Party | Before | After | Change |
| | Democratic | 26 | 27 | 1 |
| | Republican | 16 | 15 | 1 |
| Total | Total | 42 | 42 | |

### New Hampshire

All of the seats of the New Hampshire House of Representatives and the New Hampshire Senate were up for election. Democrats gained control of both legislative chambers.
New Hampshire Senate :
| Party | Party | Before | After | Change |
| | Democratic | 8 | 14 | 6 |
| | Republican | 16 | 10 | 6 |
| Total | Total | 24 | 24 | |
New Hampshire House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 151 | 239 | 88 |
| | Republican | 249 | 160 | 89 |
| | Independent | 0 | 1 | 1 |
| Total | Total | 400 | 400 | |

### New Mexico

All of the seats of the New Mexico House of Representatives were up for election; Democrats maintained control.
New Mexico House of Representatives :
| Party | Party | Before | After |
| | Democratic | 42 | 42 |
| | Republican | 28 | 28 |
| Total | Total | 70 | 70 |

### New York

All of the seats of the New York Legislature were up for election. Republicans maintained control of the Senate while Democrats maintained control of the Assembly.
New York State Senate :
| Party | Party | Before | After | Change |
| | Republican | 35 | 33 | 2 |
| | Democratic | 27 | 29 | 2 |
| Total | Total | 62 | 62 | |
New York State Assembly :
| Party | Party | Before | After | Change |
| | Democratic | 103 | 106 | 3 |
| | Independence | 0 | 1 | 1 |
| | Working Families | 0 | 1 | 1 |
| | Republican | 47 | 42 | 5 |
| Total | Total | 150 | 150 | |

### North Carolina

All of the seats of the North Carolina House of Representatives and half of the North Carolina Senate were up for election. Democrats maintained control of both state legislative chambers.
North Carolina Senate :
| Party | Party | Before | After | Change |
| | Democratic | 29 | 31 | 2 |
| | Republican | 21 | 19 | 2 |
| Total | Total | 50 | 50 | |
North Carolina House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 63 | 68 | 5 |
| | Republican | 57 | 52 | 5 |
| Total | Total | 120 | 120 | |

### North Dakota

All of the seats of the North Dakota House of Representatives and half of the North Dakota Senate were up for election. Republicans maintained control of both state legislative chambers.
North Dakota Senate :
| Party | Party | Before | After | Change |
| | Republican | 32 | 26 | 6 |
| | Democratic-NPL | 15 | 21 | 6 |
| Total | Total | 47 | 47 | |
North Dakota House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 67 | 61 | 6 |
| | Democratic-NPL | 27 | 33 | 6 |
| Total | Total | 94 | 94 | |

### Ohio

All of the seats of the Ohio House of Representatives and half of the Ohio Senate were up for election. Republicans maintained control of both chambers.
Ohio Senate :
| Party | Party | Before | After | Change |
| | Republican | 22 | 21 | 1 |
| | Democratic | 11 | 12 | 1 |
| Total | Total | 33 | 33 | |
Ohio House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 61 | 53 | 8 |
| | Democratic | 38 | 46 | 8 |
| Total | Total | 99 | 99 | |

### Oklahoma

All of the seats of the Oklahoma House of Representatives and half of the Oklahoma Senate were up for election. Democrats maintained effective control of the newly tied Senate with the Lieutenant Governor's tie-breaking vote, although both parties elected a co-president of the Senate. Republicans maintained control of the House.
Oklahoma Senate :
| Party | Party | Before | After | Change |
| | Democratic | 26 | 24 | 2 |
| | Republican | 22 | 24 | 2 |
| Total | Total | 48 | 48 | |
Oklahoma House of Representatives :
| Party | Party | Before | After |
| | Republican | 57 | 57 |
| | Democratic | 44 | 44 |
| Total | Total | 101 | 101 |

### Oregon

All of the seats of the Oregon House of Representatives and half of the Oregon Senate were up for election. Democrats maintained control of the Senate and won control of the House.
Oregon State Senate :
| Party | Party | Before | After | Change |
| | Democratic | 17 | 19 | 2 |
| | Republican | 13 | 11 | 2 |
| Total | Total | 30 | 30 | |
Oregon House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 27 | 31 | 4 |
| | Republican | 33 | 29 | 4 |
| Total | Total | 60 | 60 | |

### Pennsylvania

All of the seats of the Pennsylvania House of Representatives and half of the Pennsylvania Senate were up for election. Republicans maintained control of the Senate while Democrats won control of the House of Representatives.
Pennsylvania State Senate :
| Party | Party | Before | After |
| | Republican | 29 | 29 |
| | Democratic | 21 | 21 |
| Total | Total | 50 | 50 |
Pennsylvania House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 94 | 102 | 8 |
| | Republican | 109 | 101 | 8 |
| Total | Total | 203 | 203 | |

### Rhode Island

All of the seats of the Rhode Island Legislature were up for election. Democrats maintained control of both state legislative chambers.
Rhode Island Senate :
| Party | Party | Before | After |
| | Democratic | 33 | 33 |
| | Republican | 5 | 5 |
| Total | Total | 38 | 38 |
Rhode Island House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 59 | 60 | 1 |
| | Republican | 16 | 15 | 1 |
| Total | Total | 75 | 75 | |

### South Carolina

All of the seats of the South Carolina House of Representatives were up for election. Republicans maintained control of both the House.
South Carolina House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 74 | 73 | 1 |
| | Democratic | 50 | 51 | 1 |
| Total | Total | 124 | 124 | |

### South Dakota

All of the seats of the South Dakota Legislature were up for election. Republicans maintained control of both state legislative chambers.
South Dakota Senate :
| Party | Party | Before | After | Change |
| | Republican | 25 | 20 | 5 |
| | Democratic | 10 | 15 | 5 |
| Total | Total | 35 | 35 | |
South Dakota House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 51 | 50 | 1 |
| | Democratic | 19 | 20 | 1 |
| Total | Total | 70 | 70 | |

### Tennessee

All of the seats of the Tennessee House of Representatives and half of the Tennessee Senate were up for election. Republicans maintained control of the Senate while Democrats maintained control of the House.
Tennessee Senate :
| Party | Party | Before | After |
| | Republican | 17 | 17 |
| | Democratic | 16 | 16 |
| Total | Total | 33 | 33 |
Tennessee House of Representatives :
| Party | Party | Before | After |
| | Democratic | 53 | 53 |
| | Republican | 46 | 46 |
| Total | Total | 99 | 99 |

### Texas

All of the seats of the Texas House of Representatives and half of the Texas Senate were up for election. Republicans maintained control of both state legislative chambers.
Texas Senate :
| Party | Party | Before | After | Change |
| | Republican | 19 | 20 | 1 |
| | Democratic | 12 | 11 | 1 |
| Total | Total | 31 | 31 | |
Texas House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 86 | 81 | 5 |
| | Democratic | 64 | 69 | 5 |
| Total | Total | 150 | 150 | |

### Utah

All of the seats of the Utah House of Representatives and half of the Utah Senate were up for election. Republicans maintained control of both state legislative chambers.
Utah State Senate :
| Party | Party | Before | After |
| | Republican | 21 | 21 |
| | Democratic | 8 | 8 |
| Total | Total | 29 | 29 |
Utah House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 56 | 55 | 1 |
| | Democratic | 19 | 20 | 1 |
| Total | Total | 75 | 75 | |

### Vermont

All of the seats of the Vermont Legislature were up for election. Democrats maintained control of both state legislative chambers.
Vermont Senate :
| Party | Party | Before | After | Change |
| | Democratic | 21 | 23 | 2 |
| | Republican | 9 | 7 | 2 |
| Total | Total | 30 | 30 | |
Vermont House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 83 | 93 | 10 |
| | Republican | 60 | 49 | 11 |
| | Progressive | 6 | 6 | |
| | Independent | 1 | 2 | 1 |
| Total | Total | 150 | 150 | |

### Washington

All of the seats of the Washington House of Representatives and half of the Washington Senate were up for election. Democrats maintained control of both legislative chambers.
Washington State Senate :
| Party | Party | Before | After | Change |
| | Democratic | 26 | 32 | 6 |
| | Republican | 23 | 17 | 6 |
| Total | Total | 49 | 49 | |
Washington House of Representatives :
| Party | Party | Before | After | Change |
| | Democratic | 56 | 62 | 6 |
| | Republican | 42 | 36 | 6 |
| Total | Total | 98 | 98 | |

### West Virginia

All of the seats of the West Virginia House of Delegates and half of the West Virginia Senate were up for election. Democrats maintained control of both state legislative chambers.
West Virginia Senate :
| Party | Party | Before | After | Change |
| | Democratic | 21 | 23 | 2 |
| | Republican | 13 | 11 | 2 |
| Total | Total | 34 | 34 | |
West Virginia House of Delegates :
| Party | Party | Before | After | Change |
| | Democratic | 68 | 72 | 4 |
| | Republican | 32 | 28 | 4 |
| Total | Total | 100 | 100 | |

### Wisconsin

All of the seats of the Wisconsin Assembly and half of the Wisconsin Senate were up for election. Democrats won control of the Senate while Republicans maintained control of the Assembly.
Wisconsin Senate :
| Party | Party | Before | After | Change |
| | Democratic | 14 | 18 | 4 |
| | Republican | 19 | 15 | 4 |
| Total | Total | 33 | 33 | |
Wisconsin State Assembly :
| Party | Party | Before | After | Change |
| | Republican | 60 | 52 | 8 |
| | Democratic | 39 | 47 | 8 |
| Total | Total | 99 | 99 | |

### Wyoming

All of the seats of the Wyoming House of Representatives and half of the Wyoming Senate were up for election. Republicans maintained control of both state legislative chambers.
Wyoming Senate :
| Party | Party | Before | After |
| | Republican | 23 | 23 |
| | Democratic | 7 | 7 |
| Total | Total | 30 | 30 |
Wyoming House of Representatives :
| Party | Party | Before | After | Change |
| | Republican | 46 | 43 | 3 |
| | Democratic | 14 | 17 | 3 |
| Total | Total | 60 | 60 | |

## Territorial and federal district summaries
### American Samoa

All of the seats of the American Samoa Senate and the American Samoa House of Representatives were up for election. Members of the Senate serve four-year terms, while members of the House of Representatives serve two-year terms. Gubernatorial and legislative elections are conducted on a nonpartisan basis in American Samoa.

### Guam

All of the seats of the unicameral Legislature of Guam were up for election. All members of the legislature serve a two-year term. Republicans retained control of the legislature.

### U.S. Virgin Islands

All of the seats of the unicameral Legislature of the Virgin Islands were up for election. All members of the legislature serve a two-year term. Democrats won control of the newly created legislature.

### Washington, D.C.

The Council of the District of Columbia serves as the legislative branch of the federal district of Washington, D.C. Half of the council seats are up for election. Council members serve four-year terms. Democrats retained supermajority control of the council.