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County · Ohio

Mercer County

42,648Population
0.3 %Change since 2020
-159Net migration
3.4 %Unemployment rate

Facts

Population
42,648 (2024)
Change since 2020
0.3 %
Net migration
-159 (2023)
Unemployment rate
3.4 % (2025)
State
Ohio
Population base, April 2020
42,528 (2020)
Births
645 (2023)
Births per 1,000 residents, 2023
15.1
Deaths
438 (2023)
Deaths per 1,000 residents, 2023
10.3
Natural change, 2023
207
International migration
74 (2023)
Domestic migration
-233 (2023)
Net migration per 1,000, 2023
-3.7
Postal code
OH
FIPS code
39107

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

Unemployment rate, annual average

199020253.45.6
PeriodValue
20253.4 %
20243.3 %
20232.5 %
20222.8 %
20213.4 %
20205.6 %
20192.8 %
20182.9 %
20173.2 %
20163.4 %
20153.3 %
20143.8 %

Population estimates, 2020–2024

2020202442.6K42.5K
PeriodValue
202442,648
202342,448
202242,403
202142,387
202042,532