Primary Rules
How Indiana's Primary Works
Indiana uses a Open Primary system
Open Primary
Any registered voter can vote in any party's primary, regardless of their own party affiliation or registration status.
Voter file data: L2 Data · Registration counts: Indiana Secretary of State · Updated May 20, 2026
Indiana Voter Registration
& Party Affiliation Statistics
Total Registered
4,395,550
Most Active Primary Party
Independent/Other (44.07%)
Independent / NPP
44.07%
Primary Type
Open Primary
At a Glance
Indiana at a Glance
Key voter registration statistics · Updated 2026
Registered Voters
4,395,550
across 92 counties
Independent / NPP
44.07%
of registered voters
2024 Turnout
59.1%
of eligible voters
Primary Participation
Primary Ballot Participation by Party
Indiana does not register voters by party. The breakdown below is modeled from recent primary ballot history.
Democratic24.96%
Republican30.97%
Independent/Other44.07%
| Party | Registered Voters | % of Total |
|---|---|---|
Democratic | 1,097,084 | 24.96% |
Republican | 1,361,508 | 30.97% |
Independent/Other | 1,936,958 | 44.07% |
Note: Indiana does not collect party affiliation at voter registration. These figures are modeled from L2 voter-file analysis of which primary ballot each voter pulled in recent cycles — they reflect primary participation, not party registration.
Turnout
Voter Turnout in Indiana
How many eligible Indiana residents actually vote?
Recent Elections
| Election | Turnout | Voted |
|---|---|---|
| 2024 General | 59.1% | 2,976,581 |
| 2022 General | 37.2% | 1,880,755 |
| 2020 General | 61.1% | 3,068,542 |
| 2024 Presidential Primary | 13.5% | 593,211 |
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