2018 Indiana Senate election

Elections to the Indiana Senate took place on November 6, 2018. Primary elections were held on May 8, 2018.

Summary of Results
Source:

Close races
Two districts had a margin of victory under 10%:
 * 1)  District 31, 2.8% 
 * 2)  District 25, 7.8% 
 * 3)  District 46, 9% 

Retiring incumbents
Two incumbent senators, both Republicans, chose to not seek reelection.
 * Doug Eckerty (R), District 26
 * Jim Smith (R), District 45

In primary
One incumbent Republican senator ran for reelection but was defeated in the May 8 primary.
 * Joe Zakas (R), District 11

Detailed results
Sources: