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County · Illinois

Mason County

12,543Population
-4.1 %Change since 2020
-52Net migration
4.7 %Unemployment rate

Facts

Population
12,543 (2024)
Change since 2020
-4.1 %
Net migration
-52 (2023)
Unemployment rate
4.7 % (2025)
Population base, April 2020
13,086 (2020)
Births
122 (2023)
Births per 1,000 residents, 2023
9.7
Deaths
197 (2023)
Deaths per 1,000 residents, 2023
15.7
Natural change, 2023
-75
International migration
5 (2023)
Domestic migration
-57 (2023)
Net migration per 1,000, 2023
-4.1
Postal code
IL
FIPS code
17125

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

Unemployment rate, annual average

199020254.77.0
PeriodValue
20254.7 %
20244.8 %
20235.0 %
20224.5 %
20215.3 %
20207.6 %
20195.1 %
20185.9 %
20175.9 %
20166.9 %
20157.1 %
20148.6 %

Population estimates, 2020–2024

2020202412.5K13.1K
PeriodValue
202412,543
202312,588
202212,717
202112,826
202013,053