| Election Name: | 1970 Iowa Senate election |
| Country: | Iowa |
| Flag Image: | Flag of Iowa (variant).svg |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 1968 Iowa Senate election |
| Previous Year: | 1968 |
| Next Election: | 1972 Iowa Senate election |
| Next Year: | 1972 |
| Seats For Election: | 27 out of 50 seats in the Iowa State Senate |
| Majority Seats: | 26 |
| Election Date: | November 3, 1970 |
| Leader1: | Robert R. Rigler |
| Party1: | Republican Party (United States) |
| Leaders Seat1: | 40th (retired) |
| Last Election1: | 45 |
| Seats Before1: | 44 |
| Seat Change1: | 6 |
| Seats After1: | 38 |
| Leader2: | Andrew G. Frommelt |
| Party2: | Democratic Party (United States) |
| Leaders Seat2: | 30th (lost re-election) |
| Last Election2: | 16 |
| Seats Before2: | 17 |
| Seat Change2: | 5 |
| Seats After2: | 12 |
| Majority Leader | |
| Before Election: | Robert R. Rigler |
| Before Party: | Republican |
| After Election: | Clifton C. Lamborn |
| After Party: | Republican |
The 1970 Iowa State Senate elections took place as part of the biennial 1970 United States elections. Iowa voters elected state senators in 27 of the state senate's 50 districts. Due to redistricting following the amending of the Iowa Constitution in 1968 mandating single-member districts, the Iowa Senate downsized from 61 to 50 members following the 1970 election.[1] State senators typically serve four-year terms in the Iowa State Senate.
The Iowa General Assembly provides statewide maps of each district. To compare the effect of the 1968 redistricting process on the location of each district, contrast the previous map with the map used for 1970 elections.
The primary election on June 2, 1970 determined which candidates appeared on the November 3, 1970 general election ballot. Primary election results can be obtained here.[2] General election results can be obtained here.[3]
Following the previous election, Republicans had control of the Iowa state Senate with 45 seats to Democrats' 16 seats. In June 1969, a special election in district 18 resulted in Sen. Orr flipping a seat in favor of the Democrats. Therefore, on election day in November 1970, Republicans controlled 44 seats and Democrats had 17.
To claim control of the chamber from Republicans, the Democrats needed to net 9 Senate seats.
Republicans maintained control of the Iowa State Senate following the 1970 general election with the balance of power shifting to Republicans holding 38 seats and Democrats having 12 seats (a net loss of 6 seats for Republicans and loss of 5 seats for the Democrats).
Source:[4]
| align=center | District 6 • District 12 • District 13 • District 14 • District 16 • District 17 • District 19 • District 21 • District 22 • District 23 • District 24 • District 25 • District 26 • District 27 • District 29 • District 31 • District 33 • District 34 • District 36 • District 37 • District 38 • District 41 • District 43 • District 45 • District 46 • District 49 • District 50 |