All counties
Updated Dec 2025
Marion County Voter Registration
Monthly voter registration tracking for Marion County from May 2025 to Dec 2025. Active voters have increased by 5,915. Republican voters lead with 134,767. Active voter counts may fluctuate month-to-month due to routine maintenance activities including the removal of inactive voters, deceased individuals, and duplicate registrations.
Active Voters
260,417
+945 vs last month
Republican
134,767
+388 vs last month
Democratic
65,637
+155 vs last month
Other
60,013
+402 vs last month
New Registrations
812in Nov 2025
Republican
Democratic
Other
Party Switches
Jun 2025 – Dec 2025Net changes from affiliation switches
REP+417
DEM-429
OTH
Age & Party Distribution
Dec 2025Largest group: 66-75 (22%)
Republican
Democratic
Other