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County · Illinois

Mercer County

15,292Population
-2.6 %Change since 2020
25Net migration
5.1 %Unemployment rate

Facts

Population
15,292 (2024)
Change since 2020
-2.6 %
Net migration
25 (2023)
Unemployment rate
5.1 % (2025)
Population base, April 2020
15,696 (2020)
Births
135 (2023)
Births per 1,000 residents, 2023
8.8
Deaths
210 (2023)
Deaths per 1,000 residents, 2023
13.7
Natural change, 2023
-75
International migration
2 (2023)
Domestic migration
23 (2023)
Net migration per 1,000, 2023
1.6
Postal code
IL
FIPS code
17131

Sources: US Census Bureau — Population Estimates, Bureau of Labor Statistics — LAUS

Unemployment rate, annual average

199020255.16.2
PeriodValue
20255.1 %
20245.5 %
20234.8 %
20224.4 %
20215.0 %
20208.0 %
20195.0 %
20185.4 %
20175.2 %
20166.3 %
20156.2 %
20147.0 %

Population estimates, 2020–2024

2020202415.3K15.6K
PeriodValue
202415,292
202315,456
202215,512
202115,583
202015,632