All counties
Updated Oct 2025

Marion County Voter Registration

Monthly voter registration tracking for Marion County from May 2025 to Oct 2025. Active voters have increased by 3,664. Republican voters lead with 133,743. 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

258,166
+1,241
last month

Republican Voters

133,743
+718
last month

Democratic Voters

65,291
+104
last month

Other Voters

59,132
+419
last month

Monthly New Registrations

Age & Party Mix

256,949 active • Oct 2025
Legend:
REP
DEM
Other

Monthly Party Switches

DEM
REP
OTH
Above axis = net gain · Below axis = net loss
MonthActiveRepublicanDemocraticOtherTotalActive Change
Oct 2025258,166133,74365,29159,132309,298+1,241
Sep 2025256,925133,02565,18758,713308,375+1,279
Aug 2025255,646132,41764,92758,302307,349+1,324
Jul 2025254,322131,71364,76157,848306,263-551
Jun 2025254,873132,01864,98557,870305,661+371
May 2025254,502131,94564,97257,585306,022—