| Election Name: | 2020 Indiana Senate election |
| Country: | Indiana |
| Type: | legislative |
| Ongoing: | no |
| Previous Election: | 2018 Indiana State Senate election |
| Previous Year: | 2018 |
| Next Election: | 2022 Indiana Senate election |
| Next Year: | 2022 |
| Seats For Election: | 25 of the 50 seats in the Indiana Senate |
| Majority Seats: | 26 |
| Image1: | State-of-the-State-2020-041 (49387486086) (cropped).jpg |
| Leader1: | Rodric Bray |
| Party1: | Republican Party (US) |
| Leader Since1: | November 20, 2018 |
| Leaders Seat1: | 37th district |
| Seats Before1: | 40 |
| Seats After1: | 39 |
| Seat Change1: | 1 |
| Popular Vote1: | 778,292 |
| Percentage1: | 56.60% |
| Leader2: | Greg Taylor |
| Party2: | Democratic Party (US) |
| Leader Since2: | November 6, 2020 |
| Leaders Seat2: | 25th district |
| Seats Before2: | 10 |
| Seats After2: | 11 |
| Seat Change2: | 1 |
| Popular Vote2: | 596,836 |
| Percentage2: | 43.40% |
| Majority Leader | |
| Before Election: | Mark Messmer |
| Before Party: | Republican Party (US) |
| After Election: | Mark Messmer |
| After Party: | Republican Party (US) |
| Map Size: | 250px |
The 2020 Indiana Senate election was held on November 3, 2020 as a part of the biennial elections in the U.S. state of Indiana, coinciding with other elections in the state, including for U.S. president, U.S. House, Indiana governor, and Indiana House, as well as various other state and local elections. Voters elected members to 25 of the 50 seats in the Indiana Senate to serve four-year terms in single-member constituencies. Primary elections were held on June 2.[1]
Following the election, the Republican Party retained supermajority control of the Senate, losing one seat to the Democratic Party in the process.
One incumbent lost re-election.
| Party | Candidates | Votes | % | Seats | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Before | Up | Won | After | +/– | ||||||
| Republican | 19 | 778,292 | 56.60 | 40 | 19 | 18 | 39 | 1 | ||
| Democratic | 22 | 596,836 | 43.40 | 10 | 6 | 7 | 11 | 1 | ||
| Total | 1,375,128 | 100.00 | 50 | 25 | 25 | 50 | ||||
| Source: Indiana Election Division | ||||||||||