Mercer County, Illinois Basics:
Mercer County Illinois - Government Site
Population: 16,223
Area: 561 square miles
County seat: Aledo
Area code(s) in use: 309
Time zone: CST
High school graduate or higher: 89.1%
Bachelor's degree or higher: 14.1%
Median household income: $52,700
Persons in poverty: 10.4%
Home ownership rate: 80.3%
Mean travel time to work: 27.8 minutes
Adjacent counties:
Des Moines (IA) Henderson Henry Knox Louisa (IA) Muscatine (IA) Rock Island Warren