Mercer County Illinois Fair 2024. Groups gathered at the lake county fairgrounds on july 22 tending to animals, setting up food stands, preparing vendor stalls and more in preparation for the 2024 lake county fair.this year’s. 2024 mercer county fair fair results back.

Admission is $10 for ages 13 and up, $5 for ages 6 to 12, free for annual passholders and children aged 5 and under. Mercer county fair, aledo, illinois.