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County · Montana

Lewis and Clark County

75,129Population
5.9 %Change since 2020
1,159Net migration
3.1 %Unemployment rate

Facts

Population
75,129 (2024)
Change since 2020
5.9 %
Net migration
1,159 (2023)
Unemployment rate
3.1 % (2025)
State
Montana
Population base, April 2020
70,971 (2020)
Births
676 (2023)
Births per 1,000 residents, 2023
9.0
Deaths
719 (2023)
Deaths per 1,000 residents, 2023
9.6
Natural change, 2023
-43
International migration
13 (2023)
Domestic migration
1,146 (2023)
Net migration per 1,000, 2023
15.4
Postal code
MT
FIPS code
30049

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

Unemployment rate, annual average

199020253.14.6
PeriodValue
20253.1 %
20242.8 %
20232.6 %
20222.5 %
20213.1 %
20205.1 %
20193.1 %
20183.4 %
20173.6 %
20163.4 %
20153.4 %
20143.7 %

Population estimates, 2020–2024

2020202475.1K71.2K
PeriodValue
202475,129
202374,812
202273,681
202172,517
202071,179