Logan County has 19,180 registered voters, according to Illinois voter registration records.

The following is a list of the top 15 last names of registered voters in the county who were eligible to vote in the 2016 primary election.

Hickman
Donnelly
Nicholas
McCann
Ruff
Crowell
Voyles
Kindred
Burress
Mahler
Conaway
Polley
Wachter
Deterding
Bentz