• county
  • FIPS 16019
  • Largest town: Idaho Falls

Bonneville County, Idaho

Bonneville County had 133,644 residents in the Census Vintage 2024 estimate, on 1,866.0 square miles of land. It ranks 4th of 44 in Idaho by population and 15th by land area.

Population
133,644
#4 of 44 in Idaho · #493 in US
Area
1,866.0 sq mi
#15 of 44 in Idaho · #310 in US
Density
72 / sq mi
#6 of 44 in Idaho · #1,160 in US
Median household income
$74,948
#8 of 44 in Idaho · #671 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Bonneville County within Idaho. Pin: Boise.

Measure from here

Tools and pages that start from Bonneville County

Bonneville County population, land area and income

Bonneville County had 133,644 residents in the Census Vintage 2024 estimate, on 1,866.0 square miles of land. It ranks 4th of 44 in Idaho by population and 15th by land area. That works out to 71.6 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Idaho has 15,019 residents, so Bonneville County is 8.9 times that size.

Its SAIPE 2023 median household income of $74,948 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

133,644

3144th1st

493rd of 3,144 (US)

Land area

1,866 sq mi

3144th1st

310th of 3,144 (US)

Density

71.6 / sq mi

3144th1st

1160th of 3,144 (US)

Median household income

$74,948

3143rd1st

671st of 3,143 (US)

Rank within Idaho (44)

Population

133,644

44th1st

4th of 44 (ID)

Land area

1,866 sq mi

44th1st

15th of 44 (ID)

Density

71.6 / sq mi

44th1st

6th of 44 (ID)

Median household income

$74,948

44th1st

8th of 44 (ID)

How Bonneville County's population changed since 2020

Bonneville County gained 8,908 residents between the July 2020 and July 2024 estimates, a rise of 7.1%. That ranks 23rd of 44 in Idaho for growth. The median Idaho county changed by +7.2%, and the state as a whole by +8.2%.

Since the April 2020 estimates base, Bonneville County recorded 7,621 births and 4,423 deaths, a natural change of +3,198. Net international migration added +362 and net domestic migration, people moving to or from other US counties, came to +6,212. The largest single component was domestic migration, which added 6,212 people.

124.7k2020128.1k2021129.7k2022131.5k2023133.6k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
7,621
Deaths
4,423
Net international migration
+362
Net domestic migration
+6,212
Change, July 2023 to July 2024
+2,169

Where Bonneville County is

The Census internal point of Bonneville County is at 43.395200, -111.621900. It sits in UTM zone 12N. The map shades Idaho's 44 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Bonneville County outlined. Dots are towns of 1,000+ people with residents in it.

Madison County: +5.0%Idaho County: +8.0%Benewah County: +9.9%Gooding County: +3.4%Lincoln County: +8.2%Minidoka County: +4.7%Custer County: +7.7%Boundary County: +15.6%Lemhi County: +5.5%Twin Falls County: +6.8%Franklin County: +9.5%Oneida County: +9.0%Gem County: +13.4%Shoshone County: +6.6%Fremont County: +7.3%Clearwater County: +4.6%Kootenai County: +9.0%Cassia County: +4.9%Blaine County: +3.8%Clark County: +0.1%Jerome County: +7.4%Bonner County: +13.8%Elmore County: +3.7%Caribou County: +3.2%Bonneville County: +7.1%Jefferson County: +12.1%Power County: +6.3%Lewis County: +5.8%Nez Perce County: +1.7%Ada County: +7.5%Adams County: +12.9%Valley County: +7.9%Bingham County: +5.8%Bannock County: +4.3%Owyhee County: +6.2%Washington County: +9.3%Latah County: +6.4%Teton County: +10.2%Camas County: +15.0%Boise County: +12.0%Bear Lake County: +6.5%Butte County: +5.9%Canyon County: +14.5%Payette County: +8.1%
Change 2020 to 2024
  1. < +4.7%
  2. < +6.4%
  3. < +7.7%
  4. < +9.9%
  5. ≥ +9.9%
no data

Orange pin: Bonneville County internal point. Dark pin: Boise.

Internal point

Decimal
43.395200, -111.621900
DMS
43°23'42.72"N 111°37'18.84"W
UTM
12N 449636.0E 4804890.4N
Geohash
9x8wggz7m
Plus code
85MC99WH+36

Towns in Bonneville County

4 incorporated places of 1,000+ people have residents in Bonneville County, 93,949 people together, or 70% of the county. Each figure counts only the part of the town inside Bonneville County; towns marked "part" extend into another county. The largest is Idaho Falls with 69,523.

  1. 01Idaho Falls69,523
  2. 02Ammon20,095
  3. 03Iona3,113
  4. 04Ucon1,218
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Bonneville County

The Census 2024 county adjacency file lists 7 neighbors for Bonneville County, including 2 across a state line. The most populous is Madison County, ID, with 55,549 residents. Distances run between Census internal points in a straight line.

Distance to Boise and the nearest big city

Boise is 230.7 miles W of Bonneville County's internal point in a straight line. The nearest place of 100,000 or more is Salt Lake City, UT (population 217,783), 181.6 miles away. The nearest place of 10,000 or more is Ammon, ID (population 20,095), 17.8 miles away.

Bonneville County FIPS code

The FIPS code of Bonneville County is 16019: state code 16 for Idaho plus county code 019. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $74,948.

Questions people ask

What is the population of Bonneville County, Idaho?

The Census Vintage 2024 estimate for July 1, 2024 is 133,644. That is up 8,908 people (7.1%) from the July 2020 estimate of 124,736.

What is the FIPS code of Bonneville County?

16019. The first two digits (16) are Idaho; the last three (019) identify the county.

What is the largest town in Bonneville County?

Idaho Falls, with 69,523 residents inside Bonneville County in 2024.

Which counties border Bonneville County?

7 county-equivalents border it in the Census 2024 adjacency file: Madison County, ID; Bingham County, ID; Jefferson County, ID; Teton County, WY; Lincoln County, WY; Teton County, ID; Caribou County, ID.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.