All counties
Updated Oct 2025

Lake County Voter Registration

Monthly voter registration tracking for Lake County from May 2025 to Oct 2025. Active voters have decreased by 11,129. Republican voters lead with 128,934. 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

268,659
+1,326
last month

Republican Voters

128,934
+682
last month

Democratic Voters

66,720
+128
last month

Other Voters

73,005
+516
last month

Monthly New Registrations

Age & Party Mix

266,720 active • Oct 2025
Legend:
REP
DEM
Other

Monthly Party Switches

DEM
REP
OTH
Above axis = net gain · Below axis = net loss
MonthActiveRepublicanDemocraticOtherTotalActive Change
Oct 2025268,659128,93466,72073,005319,680+1,326
Sep 2025267,333128,25266,59272,489318,762+1,091
Aug 2025266,242127,77666,43472,032318,067+1,856
Jul 2025264,386126,99966,09071,297316,832-16,691
Jun 2025281,077132,49270,15378,432316,763+1,289
May 2025279,788131,90369,89477,991326,432—