# 1966 Iowa Senate election

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The 1966 Iowa State Senate elections took place as part of the biennial 1966 United States elections. Iowa voters elected state senators in 32 of the state senate's 61 districts. At this time, the Iowa Senate still had several multi-member districts. State senators serve four-year terms in the Iowa State Senate.
The Iowa Senate was expanded from 59 to 61 members and new district maps were drawn for the 1966 election. The Iowa General Assembly provides statewide maps of each district.
The primary election on September 6, 1966, determined which candidates appeared on the November 8, 1966 general election ballot.
Following the previous election, Democrats had control of the Iowa state Senate with 34 seats to Republicans' 25 seats.
To claim control of the chamber from Democrats, the Republicans needed to net 6 Senate seats.
Democrats maintained control of the Iowa State Senate following the 1966 general election with the balance of power shifting to Democrats holding 32 seats and Republicans having 29 seats (a net gain of 4 seats for Republicans and net loss of 2 seats for Democrats).

## Summary of Results

* Note: The 29 holdover Senators not up for re-election are listed here with asterisks (*).
| State Senate District | Incumbent | Party | Party | Incoming Senator | Party | Party |
| 1st | Seeley G. Lodwick | | Rep | Seeley G. Lodwick | | Rep |
| 2nd | Max E. Reno | | Dem | Max E. Reno* | | Dem |
| 3rd | Don S. McGill | | Dem | Don S. McGill* | | Dem |
| 4th | Franklin S. Main | | Dem | Franklin S. Main* | | Dem |
| 5th | James E. Briles | | Rep | James E. Briles* | | Rep |
| 6th | Charles Vernon "Vern" Lisle | | Rep | Charles Vernon "Vern" Lisle | | Rep |
| 7th | Robert R. Dodds | | Dem | Robert R. Dodds | | Dem |
| 8th | Clifford M. Vance | | Rep | Richard Lytle Stephens | | Rep |
| 9th | Jacob B. "Jake" Mincks | | Dem | Gene W. Glenn | | Dem |
| 10th | Richard Lytle Stephens | | Rep | Bass Van Gilst* | | Dem |
| 11th | Bass Van Gilst | | Dem | Stanley M. Heaberlin* | | Dem |
| 12th | Stanley M. Heaberlin | | Dem | Joseph B. Flatt* | | Rep |
| 13th | Joseph B. Flatt | | Rep | Thomas J. "T. J." Frey | | Rep |
| 13th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Gilbert E. Klefstad* | | Dem |
| 14th | John David Shoeman | | Rep | David M. Stanley* | | Rep |
| 15th | Gilbert E. Klefstad | | Dem | Joseph W. Cassidy* | | Dem |
| 15th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Roger W. Jepsen | | Rep |
| 16th | David M. Stanley | | Rep | Roger John Shaff | | Rep |
| 17th | Joseph W. Cassidy | | Dem | Robert J. Burns* | | Dem |
| 17th | Jack Schroeder | | Rep | Robert J. Burns* | | Dem |
| 18th | David O. Shaff | | Rep | Kenneth Benda | | Rep |
| 19th | Howard Tabor | | Dem | Eugene Marshall Hill | | Dem |
| 20th | John M. Ely | | Dem | Howard Reppert* | | Dem |
| 20th | Tom Riley | | Rep | George E. O'Malley | | Dem |
| 20th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | William F. Denman | | Dem |
| 20th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Lee H. Gaudineer | | Dem |
| 20th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | William J. "Bill" Reichardt | | Dem |
| 21st | Robert J. Burns | | Dem | Edwin Alan Shirley* | | Dem |
| 22nd | Charles Balloun | | Rep | James F. Schaben | | Dem |
| 23rd | Kenneth Benda | | Rep | Clifton C. Lamborn | | Rep |
| 24th | Max Milo Mills | | Rep | John M. Ely* | | Dem |
| 24th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Ernest Kosek | | Rep |
| 24th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Tom Riley | | Rep |
| 25th | Eugene Marshall Hill | | Dem | Charles F. Balloun | | Rep |
| 26th | Daryl Hallett Nims | | Dem | Max Milo Mills* | | Rep |
| 27th | Howard Reppert | | Dem | Pearle P. DeHart | | Rep |
| 27th | George E. O'Malley | | Dem | Pearle P. DeHart | | Rep |
| 27th | William F. Denman | | Dem | Pearle P. DeHart | | Rep |
| 28th | Warren J. Kruck | | Dem | Warren J. Kruck* | | Dem |
| 29th | Alan Shirley | | Dem | Arthur A. Neu | | Rep |
| 30th | Peter F. Hansen | | Dem | Andrew G. Frommelt | | Dem |
| 30th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | John M. Walsh | | Rep |
| 31st | Charles F. Griffin | | Rep | John W. Patton* | | Dem |
| 32nd | Andrew G. Frommelt | | Dem | Francis L. Messerly | | Rep |
| 32nd | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Chester O. Hougen | | Rep |
| 32nd | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Gene F. Condon* | | Dem |
| 33rd | John W. Patton | | Dem | James A. Potgeter | | Rep |
| 34th | Gene F. Condon | | Dem | Hugh H. Clarke | | Rep |
| 34th | Francis LaVern Messerly | | Rep | Hugh H. Clarke | | Rep |
| 35th | John A. Walker | | Rep | C. Joseph Coleman* | | Dem |
| 36th | C. Joseph Coleman | | Dem | Elmer F. Lange | | Rep |
| 37th | Donald G. Beneke | | Rep | Charles S. Van Eaton | | Rep |
| 37th | Newly created subdistrict | Newly created subdistrict | Newly created subdistrict | Alden J. Erskine | | Rep |
| 38th | J. Henry Lucken | | Rep | Adolph W. Elvers* | | Dem |
| 39th | Vincent S. Burke | | Dem | Hilarius Louis "H. L." Heying* | | Dem |
| 39th | James M. McNally | | Dem | Hilarius Louis "H. L." Heying* | | Dem |
| 40th | Adolph W. Elvers | | Dem | Robert R. Rigler | | Rep |
| 41st | Hilarius Louis "H. L." Heying | | Dem | Vernon Kyhl* | | Rep |
| 42nd | Vernon Kyhl | | Rep | Delbert W. Floy* | | Dem |
| 43rd | Raymond W. Hagie | | Rep | John L. Buren* | | Dem |
| 44th | Robert R. Rigler | | Rep | Donald W. Murray* | | Dem |
| 45th | Leo Elthon | | Rep | John P. "Jack" Kibbie* | | Dem |
| 46th | Delbert W. Floy | | Dem | Merle W. Hagedorn* | | Dem |
| 47th | John Leonard Buren | | Dem | J. Henry Lucken* | | Rep |
| 48th | Jack Kibbie | | Dem | H. Kenneth Nurse* | | Dem |
| 49th | H. Kenneth Nurse | | Dem | Lucas DeKoster* | | Rep |
| 50th | Lucas DeKoster | | Rep | Obsolete district | Obsolete district | Obsolete district |
| 51st | Merle W. Hagedorn | | Dem | Obsolete district | Obsolete district | Obsolete district |
| 52nd | Elmer F. Lange | | Rep | Obsolete district | Obsolete district | Obsolete district |
| 53rd | Donald W. Murray | | Dem | Obsolete district | Obsolete district | Obsolete district |
Source:

## Detailed Results

* 32 of the 61 Iowa Senate seats were up for election in 1966.
* Note: If a district does not list a primary, then that district did not have a competitive primary (i.e., there may have only been one candidate file for that district).

### District 1

Iowa Senate, District 1 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Seeley G. Lodwick (incumbent) | 7,612 | 56.5 |
| | Democratic | Robert O'Malley | 5,872 | 43.5 |
| Total votes | Total votes | Total votes | 13,484 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 6

Iowa Senate, District 6 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Vern Lisle (incumbent) | 10,046 | 71.8 |
| | Democratic | F. S. Toke Nelson | 3,937 | 28.2 |
| Total votes | Total votes | Total votes | 13,983 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 7

Iowa Senate, District 7 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Robert R. Dodds (incumbent) | 8,225 | 55.3 |
| | Republican | Robert A. Reppert | 6,655 | 44.7 |
| Total votes | Total votes | Total votes | 14,880 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### District 8

Iowa Senate, District 8 Republican Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Richard L. Stephens (incumbent) | 2,670 | 61.4 |
| | Republican | Ralph B. Morris | 1,676 | 38.6 |
| Total votes | Total votes | Total votes | 4,346 | 100.0 |
Iowa Senate, District 8 Democratic Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | F. W. Schnoebelen | 882 | 58.5 |
| | Democratic | Ralph H. Smutz | 626 | 41.5 |
| Total votes | Total votes | Total votes | 1,508 | 100.0 |
Iowa Senate, District 8 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Richard L. Stephens (incumbent) | 9,051 | 61.4 |
| | Democratic | F. W. Schnoebelen | 5,697 | 38.6 |
| Total votes | Total votes | Total votes | 14,748 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 9

Iowa Senate, District 9 Democratic Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Gene W. Glenn | 2,257 | 58.8 |
| | Democratic | Jake B. Mincks (incumbent) | 1,579 | 41.2 |
| Total votes | Total votes | Total votes | 3,836 | 100.0 |
Iowa Senate, District 9 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Gene W. Glenn | 7,745 | 52.8 |
| | Republican | Robert A. Haw | 6,928 | 47.2 |
| Total votes | Total votes | Total votes | 14,673 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### District 13

* The 13th was a 2-member district following the 1966 election. Subdistrict No. 2 was held by holdover Senator Klefstad.
Iowa Senate, District 13 Subdistrict No. 1 Republican Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | T. J. Frey | 2,529 | 52.0 |
| | Republican | Wylie D. King | 2,331 | 48.0 |
| Total votes | Total votes | Total votes | 4,860 | 100.0 |
Iowa Senate, District 13 Subdistrict No. 1 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | T. J. Frey | 12,736 | 65.4 |
| | Democratic | Paul E. Wise | 6,752 | 34.6 |
| Total votes | Total votes | Total votes | 19,488 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 14

Iowa Senate, District 14 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | David Stanley (incumbent) | 11,055 | 73.4 |
| | Democratic | Herschel Flater | 4,008 | 26.6 |
| Total votes | Total votes | Total votes | 15,063 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 15

* The 15th was a 2-member district following the 1966 election. Subdistrict No. 1 was held by holdover Senator Cassidy.
Iowa Senate, District 15 Subdistrict No. 2 Republican Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Roger W. Jepsen | 4,099 | 70.0 |
| | Republican | Riley Dietz | 1,753 | 30.0 |
| Total votes | Total votes | Total votes | 5,852 | 100.0 |
Iowa Senate, District 15 Subdistrict No. 2 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Roger W. Jepsen | 22,158 | 60.6 |
| | Democratic | Carroll L. Wright | 14,433 | 39.4 |
| Total votes | Total votes | Total votes | 36,591 | 100.0 |

### District 16

Iowa Senate, District 16 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Roger J. Shaff | 9,207 | 57.0 |
| | Democratic | David J. Delaney | 6,945 | 43.0 |
| Total votes | Total votes | Total votes | 16,152 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 18

Iowa Senate, District 18 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Kenneth Benda (incumbent) | 7,202 | 100.0 |
| Total votes | Total votes | Total votes | 7,202 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 19

Iowa Senate, District 19 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Eugene M. Hill (incumbent) | 6,351 | 52.2 |
| | Republican | Emmett Butler | 5,809 | 47.8 |
| Total votes | Total votes | Total votes | 12,160 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### District 20

* The 20th was a 5-member district following the 1966 election. Subdistrict No. 1 was held by holdover Senator Reppert. Subdistrict No. 4 held an election for a two-year term; whereas, subdistricts Nos. 2, 3, & 5 held elections for four-year terms.
Iowa Senate, District 20 Subdistrict Nos. 2, 3, & 5 Democratic Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | George E. O'Malley (incumbent) | 7,890 | 31.7 |
| | Democratic | William F. Denman (incumbent) | 6,738 | 27.0 |
| | Democratic | William J. "Bill" Reichardt | 5,290 | 21.2 |
| | Democratic | F. Mac Danielson | 5,000 | 20.1 |
| Total votes | Total votes | Total votes | 24,918 | 100.0 |
Iowa Senate, District 20 Subdistrict Nos. 2, 3, & 5 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | George E. O'Malley (incumbent) | 45,525 | 18.9 |
| | Democratic | William F. Denman (incumbent) | 44,254 | 18.4 |
| | Democratic | William J. "Bill" Reichardt | 43,599 | 18.1 |
| | Republican | Kate Goldman | 39,589 | 16.4 |
| | Republican | Joseph B. Joyce | 33,341 | 13.9 |
| | Republican | James E. Ball III | 32,643 | 13.6 |
| | Constitution | Albert A. Payne | 1,104 | 0.4 |
| | Constitution | Larry Russell Jaussi | 669 | 0.3 |
| Total votes | Total votes | Total votes | 240,724 | 100.0 |
* Election for a two-year term in subdistrict No. 4.
Iowa Senate, District 20 Subdistrict No. 4 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Lee H. Gaudineer, Jr. | 43,473 | 55.5 |
| | Republican | Gerald C. Shearer | 34,891 | 44.5 |
| Total votes | Total votes | Total votes | 78,364 | 100.0 |

### District 22

Iowa Senate, District 22 Democratic Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | James F. Schaben | 1,490 | 70.1 |
| | Democratic | Elroy Maule | 637 | 29.9 |
| Total votes | Total votes | Total votes | 2,127 | 100.0 |
Iowa Senate, District 22 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | James F. Schaben | 8,179 | 54.3 |
| | Republican | Rowley L. Williams | 6,877 | 45.7 |
| Total votes | Total votes | Total votes | 15,056 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### District 23

Iowa Senate, District 23 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Clifton C. Lamborn | 6,896 | 55.8 |
| | Democratic | John A. Holmes | 5,452 | 44.2 |
| Total votes | Total votes | Total votes | 12,348 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 24

* The 24th was a 3-member district following the 1966 election. Subdistrict No. 1 was held by holdover Senator Ely. Subdistricts Nos. 2 & 3 held elections.
Iowa Senate, District 24 Subdistricts Nos. 2 & 3 Republican Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom Riley (incumbent) | 5,776 | 43.5 |
| | Republican | Ernest Kosek | 3,828 | 28.7 |
| | Republican | John Zacher, Jr. | 3,689 | 27.8 |
| Total votes | Total votes | Total votes | 13,293 | 100.0 |
Iowa Senate, District 24 Subdistricts Nos. 2 & 3 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tom Riley (incumbent) | 29,276 | 32.3 |
| | Republican | Ernest Kosek | 23,637 | 26.1 |
| | Democratic | Kenneth M. Moore | 20,688 | 22.9 |
| | Democratic | Carl B. Newell | 17,106 | 18.7 |
| Total votes | Total votes | Total votes | 90,707 | 100.0 |

### District 25

Iowa Senate, District 25 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Charles F. Balloun (incumbent) | 7,834 | 57.5 |
| | Democratic | Russell O. Callahan | 5,796 | 42.5 |
| Total votes | Total votes | Total votes | 13,630 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### District 27

Iowa Senate, District 27 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Pearle P. DeHart | 8,087 | 52.3 |
| | Democratic | Daryl H. Nims (incumbent) | 7,365 | 47.7 |
| Total votes | Total votes | Total votes | 15,452 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### District 29

Iowa Senate, District 29 Democratic Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Louis R. Galetich | 2,686 | 58.9 |
| | Democratic | Peter F. Hansen (incumbent) | 1,872 | 41.1 |
| Total votes | Total votes | Total votes | 4,558 | 100.0 |
Iowa Senate, District 29 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Arthur A. Neu | 7,526 | 54.2 |
| | Democratic | Louis R. Galetich | 6,372 | 45.8 |
| Total votes | Total votes | Total votes | 13,898 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### District 30

* The 30th was a 2-member district following the 1966 election. Both subdistricts Nos. 1 & 2 held elections.
Iowa Senate, District 30 Subdistricts Nos. 1 & 2 Democratic Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Andrew G. Frommelt (incumbent) | 4,276 | 41.7 |
| | Democratic | Frank A. Saunders | 3,636 | 35.4 |
| | Democratic | Henry Bregman | 2,348 | 22.9 |
| Total votes | Total votes | Total votes | 10,260 | 100.0 |
Iowa Senate, District 30 Subdistricts Nos. 1 & 2 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Andrew G. Frommelt (incumbent) | 14,593 | 35.62 |
| | Republican | John M. Walsh | 14,587 | 35.60 |
| | Democratic | Frank A. Saunders | 11,789 | 28.78 |
| Total votes | Total votes | Total votes | 40,969 | 100.0 |

### District 32

* The 32nd was a 3-member district following the 1966 election. Subdistrict No. 3 had a holdover Senator Condon. Subdistricts Nos. 1 & 2 held elections.
Iowa Senate, District 32 Subdistricts Nos. 1 & 2 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Francis Messerly (incumbent) | 21,255 | 28.3 |
| | Republican | Chester O. Hougen | 20,507 | 27.3 |
| | Democratic | Gertrude S. Cohen | 16,746 | 22.3 |
| | Democratic | J. L. Rooff | 16,504 | 22.1 |
| Total votes | Total votes | Total votes | 75,012 | 100.0 |

### District 33

Iowa Senate, District 33 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | James A. Potgeter | 10,907 | 69.3 |
| | Democratic | A. T. Keough | 4,830 | 30.7 |
| Total votes | Total votes | Total votes | 15,737 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### District 34

Iowa Senate, District 34 Republican Primary Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Hugh H. Clarke | 1,940 | 50.4 |
| | Republican | John A. Walker (incumbent) | 1,911 | 49.6 |
| Total votes | Total votes | Total votes | 3,851 | 100.0 |
Iowa Senate, District 34 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Hugh Clarke | 6,890 | 61.9 |
| | Democratic | Edward E. Busing | 4,239 | 38.1 |
| Total votes | Total votes | Total votes | 11,129 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 36

Iowa Senate, District 36 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Elmer F. Lange (incumbent) | 8,556 | 67.0 |
| | Democratic | Earl Vannatta | 4,205 | 33.0 |
| Total votes | Total votes | Total votes | 12,761 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### District 37

* The 37th was a 2-member district following the 1966 election. Subdistrict No. 1 held a special election for a two-year term. Subdistrict No. 2 held an election for a four-year term.
Iowa Senate, District 37 Subdistrict No. 1 Special Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Charles S. Van Eaton | 17,637 | 55.7 |
| | Democratic | John S. Sheehan | 14,051 | 44.3 |
| Total votes | Total votes | Total votes | 31,688 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |
* Subdistrict No. 2 held an election for a four-year term.
Iowa Senate, District 37 Subdistrict No. 2 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Alden J. Erskine | 17,090 | 54.2 |
| | Democratic | Donald V. Doyle | 14,436 | 45.8 |
| Total votes | Total votes | Total votes | 31,526 | 100.0 |

### District 40

Iowa Senate, District 40 General Election, 1966 :
| Party | Party | Candidate | Votes | % |
| | Republican | Robert R. Rigler (incumbent) | 10,099 | 61.0 |
| | Democratic | William C. Shea | 6,461 | 39.0 |
| Total votes | Total votes | Total votes | 16,560 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |
* 1 2 3 The Iowa state Senate was expanded from 59 to 61 seats following the 1966 election.
* 1 2 3 Redistricted from district 10 to 8.
* ↑ Redistricted from district 11 to 10.
* ↑ Redistricted from district 12 to 11.
* ↑ Redistricted from district 13 to 12.
* ↑ The 13th transitioned from a 1- to 2-member district.
* ↑ Redistricted from district 15 to 13.
* 1 2 Redistricted from district 16 to 14.
* ↑ The 15th transitioned from a 1- to 2-member district.
* ↑ Redistricted from district 17 to 15.
* ↑ The 17th transitioned from a 2- to 1-member district.
* ↑ Redistricted from district 21 to 17.
* 1 2 Redistricted from district 23 to 18.
* 1 2 Redistricted from district 25 to 19.
* ↑ The 20th transitioned from a 2- to 5-member district.
* ↑ Redistricted from district 27 to 20.
* 1 2 3 Redistricted from district 27 to 20.
* 1 2 3 Redistricted from district 27 to 20.
* ↑ Redistricted from district 29 to 21.
* ↑ The 24th transitioned from a 1- to 3-member district.
* ↑ Redistricted from district 20 to 24.
* 1 2 3 Redistricted from district 20 to 24.
* 1 2 Redistricted from district 22 to 25.
* ↑ Redistricted from district 24 to 26.
* ↑ The 27th transitioned from a 3- to 1-member district.
* ↑ The 30th transitioned from a 1- to 2-member district.
* 1 2 3 Redistricted from district 32 to 30.
* ↑ Redistricted from district 33 to 31.
* ↑ The 32nd transitioned from a 1- to 3-member district.
* 1 2 Redistricted from district 34 to 32.
* ↑ Redistricted from district 34 to 32.
* ↑ The 34th transitioned from a 2- to 1-member district.
* ↑ Redistricted from district 36 to 35.
* 1 2 Redistricted from district 52 to 36.
* ↑ The 37th transitioned from a 1- to 2-member district.
* ↑ Redistricted from district 40 to 38.
* ↑ The 39th transitioned from a 2- to 1-member district.
* ↑ Redistricted from district 41 to 39.
* 1 2 Redistricted from district 44 to 40.
* ↑ Redistricted from district 42 to 41.
* ↑ Redistricted from district 46 to 42.
* ↑ Redistricted from district 47 to 43.
* ↑ Redistricted from district 53 to 44.
* ↑ Redistricted from district 48 to 45.
* ↑ Redistricted from district 51 to 46.
* ↑ Redistricted from district 38 to 47.
* ↑ Redistricted from district 49 to 48.
* ↑ Redistricted from district 50 to 49.
* ↑ The 50th district became obsolete (done away with) following redistricting.
* ↑ The 51st district became obsolete (done away with) following redistricting.
* ↑ The 52nd district became obsolete (done away with) following redistricting.
* ↑ The 53rd district became obsolete (done away with) following redistricting.
* ↑ Multi-member districts in the electoral map of 1966 elections were: 13th with 2 seats; 15th with 2 seats; 20th with 5 seats; 24th with 3 seats; 30th with 2 seats; 32nd with 3 seats; and, 37th with 2 seats. Remember, in 1966, multi-member districts still existed in the Iowa Senate.
* ↑ Redistricted from district 26 to 27.
* ↑ Redistricted from district 30 to 29.
* ↑ Redistricted from district 35 to 34.