Boundary County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 25th-largest in Idaho
The population of Boundary County, Idaho is 12,695 as of the 2023 American Community Survey, making it the 25th-largest county in Idaho. The median household income is $62,438, the median home value is $344,100, and the median age is 42.8.
The population of Boundary County has grown 27.7% since 2010 (10,998 → 14,040), a +1.76% annualized rate.
12,695
Population
+1.76%
Annual growth
10
People / sq mi
$62,438
Median Income
$344,100
Median Home Value
Boundary County covers 1,269 sq mi of land at 10.0 people per square mile.
About Boundary County, ID
Boundary County is distinguished by its share of foreign-born residents, 62.3% of the population. Boundary County is a county in Idaho with a population of 12,695. It ranks #25 among counties in Idaho by population.
Household earnings are middling, with a median of $62,438 — below the US median of $78,538. The poverty rate is 16.4%, above the national 12.4%. A typical home is worth $344,100, with typical rent around $867.
Degree attainment is mid-range for US counties: 19.6% of adults hold a four-year degree, below the national 35.0%. About 8.5% of the workforce is home-based, below the national 14.0%, and the average commute runs about 21 minutes each way.
The large foreign-born share is a defining thread in Boundary County, shaping language, household composition, and the labor force behind the economic figures above.
Boundary County Population History (2010-2024)
The county of Boundary County had a population of 10,998 in 2010 and 14,040 in 2024, a 27.7% growth over 14 years. The peak was 14,040 in 2024. Average annual growth rate: 1.78%.
14,040
Population (2024)
10,998
Population (2010)
14,040
Peak (2024)
1.78%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 10,998 |
| 2011 | 10,822 |
| 2012 | 10,816 |
| 2013 | 10,856 |
| 2014 | 10,963 |
| 2015 | 11,310 |
| 2016 | 11,714 |
| 2017 | 11,995 |
| 2018 | 12,073 |
| 2019 | 12,340 |
| 2020 | 12,141 |
| 2021 | 12,627 |
| 2022 | 13,377 |
| 2023 | 13,677 |
| 2024 | 14,040 |
Race & Ethnicity
| White | 88.8% |
| Black or African American | 0.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.2% |
| Two or More Races | 0.0% |
Age & Sex
42.8
Median Age
48.9%
Female
51.1%
Male
23.5%
Age 65+
Age Distribution
Children (under 15): 19.2% · Seniors (65+): 23.5%
Income & Poverty
| Median household income | $62,438$-12,198 vs state |
| Mean household income | $75,791 |
| Per-capita income | $29,672 |
| Poverty rate | 16.4%+9.4% vs state |
| Unemployment rate | 1.7% |
| Employment-to-population | 48.3% |
Top Industries by Employment
The largest employment sector in Boundary County is professional & business services, accounting for 13.6% of workers.
How residents commute
0.0%
Drive alone
4.9%
Carpool
74.4%
Public transit
8.5%
Work from home
20.6 min
Avg commute
Housing
$344,100$-31,900 vs state
Median home value
$867
Median rent
78.0%
Homeownership rate
5,535
Total housing units
87.4%
Occupied
12.6%
Vacant
22.0%
Renter-occupied
Social & access
86.4%
With health insurance
95.1%
With broadband internet
62.3%
Foreign-born
11.8%
Veterans (18+)
17.9%
With a disability
93.3%
Speak language other than English at home
Education
87.2%
High School+
19.6%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Boundary County, Idaho has a population of 12,695 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 25th-largest county in Idaho. Population density is 10 people per square mile.
The population of Boundary County has grown 27.7% since 2010 (10,998 → 14,040), a +1.76% annualized rate.
The median household income in Boundary County, Idaho is $62,438, with mean (average) household income of $75,791 and per-capita income of $29,672. 16.4% of residents live below the federal poverty level.
In Boundary County, the largest racial and ethnic groups are White (88.8%), Hispanic or Latino (3.2%), Black or African American (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Boundary County, Idaho is 42.8 years. Residents are 48.9% female and 51.1% male.
The median home value in Boundary County is $344,100 and median monthly rent is $867. 78.0% of occupied housing units are owner-occupied. The county has 5,535 total housing units, 12.6% of which are vacant.
The largest employment sector in Boundary County, Idaho is professional, scientific, and management services, employing 13.6% of workers. The unemployment rate is 1.7%.
Boise City is among the largest cities associated with Boundary County, Idaho, with a population of 235,701.
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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.