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County · Idaho

Jefferson County

34,854Population
12.8 %Change since 2020
653Net migration
2.9 %Unemployment rate

Facts

Population
34,854 (2024)
Change since 2020
12.8 %
Net migration
653 (2023)
Unemployment rate
2.9 % (2025)
State
Idaho
Population base, April 2020
30,891 (2020)
Births
464 (2023)
Births per 1,000 residents, 2023
13.3
Deaths
228 (2023)
Deaths per 1,000 residents, 2023
6.5
Natural change, 2023
236
International migration
50 (2023)
Domestic migration
603 (2023)
Net migration per 1,000, 2023
18.7
Postal code
ID
FIPS code
16051

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

Unemployment rate, annual average

199020252.95.1
PeriodValue
20252.9 %
20242.9 %
20232.5 %
20222.3 %
20212.6 %
20203.4 %
20192.2 %
20182.2 %
20172.4 %
20162.9 %
20153.2 %
20143.7 %

Population estimates, 2020–2024

2020202434.9K31.1K
PeriodValue
202434,854
202334,259
202233,365
202132,208
202031,082