Bannock County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 6th-largest in Idaho
The population of Bannock County, Idaho is 88,457 as of the 2023 American Community Survey, making it the 6th-largest county in Idaho. The median household income is $64,080, the median home value is $267,200, and the median age is 35.0.
The population of Bannock County has grown 9.6% since 2010 (83,026 → 91,010), a +0.66% annualized rate.
88,457
Population
+0.66%
Annual growth
80
People / sq mi
$64,080
Median Income
$267,200
Median Home Value
Bannock County covers 1,112 sq mi of land at 79.5 people per square mile.
About Bannock County, ID
Age is the most distinctive thing about Bannock County: a median age of 35.0, younger than the national median. With 88,457 residents, Bannock County is a county in Idaho. It is the #6-largest of all counties in Idaho nationally.
The typical household here earns about $64,080, below the US median of $78,538. Poverty runs at 7.6%, below the national 12.4%. Home values run above average at $267,200, with typical rent around $879.
College attainment is above the local norm at 30.2%, below the national 35.0%. About 10.5% of workers primarily work from home, below the national 14.0%, and the average commute runs about 18 minutes each way.
Bannock County Population History (2010-2024)
The county of Bannock County had a population of 83,026 in 2010 and 91,010 in 2024, a 9.6% growth over 14 years. The peak was 91,010 in 2024. Average annual growth rate: 0.66%.
91,010
Population (2024)
83,026
Population (2010)
91,010
Peak (2024)
0.66%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 83,026 |
| 2011 | 83,657 |
| 2012 | 83,781 |
| 2013 | 83,494 |
| 2014 | 83,587 |
| 2015 | 84,263 |
| 2016 | 84,762 |
| 2017 | 85,571 |
| 2018 | 86,761 |
| 2019 | 87,822 |
| 2020 | 87,281 |
| 2021 | 88,523 |
| 2022 | 89,871 |
| 2023 | 90,585 |
| 2024 | 91,010 |
Race & Ethnicity
| White | 84.3% |
| Black or African American | 0.9% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 4.2% |
| Two or More Races | 0.1% |
Age & Sex
35.0
Median Age
49.8%
Female
50.2%
Male
15.0%
Age 65+
Age Distribution
Children (under 15): 21.0% · Seniors (65+): 15.0%
Income & Poverty
| Median household income | $64,080$-10,556 vs state |
| Mean household income | $83,414 |
| Per-capita income | $32,268 |
| Poverty rate | 7.6%+0.6% vs state |
| Unemployment rate | 2.9% |
| Employment-to-population | 59.1% |
Top Industries by Employment
The largest employment sector in Bannock County is professional & business services, accounting for 29.0% of workers.
How residents commute
1.2%
Drive alone
2.5%
Carpool
75.1%
Public transit
10.5%
Work from home
18.3 min
Avg commute
Housing
$267,200$-108,800 vs state
Median home value
$879
Median rent
68.6%
Homeownership rate
35,683
Total housing units
93.4%
Occupied
6.6%
Vacant
31.4%
Renter-occupied
Social & access
92.8%
With health insurance
94.5%
With broadband internet
37.7%
Foreign-born
7.0%
Veterans (18+)
15.4%
With a disability
94.2%
Speak language other than English at home
Education
93.8%
High School+
30.2%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Bannock County, Idaho has a population of 88,457 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 6th-largest county in Idaho. Population density is 80 people per square mile.
The population of Bannock County has grown 9.6% since 2010 (83,026 → 91,010), a +0.66% annualized rate.
The median household income in Bannock County, Idaho is $64,080, with mean (average) household income of $83,414 and per-capita income of $32,268. 7.6% of residents live below the federal poverty level.
In Bannock County, the largest racial and ethnic groups are White (84.3%), Hispanic or Latino (4.2%), Black or African American (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Bannock County, Idaho is 35.0 years. Residents are 49.8% female and 50.2% male.
The median home value in Bannock County is $267,200 and median monthly rent is $879. 68.6% of occupied housing units are owner-occupied. The county has 35,683 total housing units, 6.6% of which are vacant.
The largest employment sector in Bannock County, Idaho is professional, scientific, and management services, employing 29.0% of workers. The unemployment rate is 2.9%.
Boise City is among the largest cities associated with Bannock County, Idaho, with a population of 235,701.
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Full rankings of Idaho counties
Statewide data for Idaho
Population, race, income, age, and trends across Idaho
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.