• county
  • FIPS 16013
  • Largest town: Hailey

Blaine County, Idaho

Blaine County had 25,261 residents in the Census Vintage 2024 estimate, on 2,637.7 square miles of land. It ranks 17th of 44 in Idaho by population and 7th by land area.

Population
25,261
#17 of 44 in Idaho · #1,614 in US
Area
2,637.7 sq mi
#7 of 44 in Idaho · #199 in US
Density
9.6 / sq mi
#24 of 44 in Idaho · #2,581 in US
Median household income
$94,471
#2 of 44 in Idaho · #187 in US

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

Blaine County within Idaho. Pin: Boise.

Measure from here

Tools and pages that start from Blaine County

Blaine County population, land area and income

Blaine County had 25,261 residents in the Census Vintage 2024 estimate, on 2,637.7 square miles of land. It ranks 17th of 44 in Idaho by population and 7th by land area. That works out to 9.6 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in Idaho has 15,019 residents; Blaine County is somewhat larger.

Its SAIPE 2023 median household income of $94,471 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

25,261

3144th1st

1614th of 3,144 (US)

Land area

2,638 sq mi

3144th1st

199th of 3,144 (US)

Density

9.6 / sq mi

3144th1st

2581st of 3,144 (US)

Median household income

$94,471

3143rd1st

187th of 3,143 (US)

Rank within Idaho (44)

Population

25,261

44th1st

17th of 44 (ID)

Land area

2,638 sq mi

44th1st

7th of 44 (ID)

Density

9.6 / sq mi

44th1st

24th of 44 (ID)

Median household income

$94,471

44th1st

2nd of 44 (ID)

How Blaine County's population changed since 2020

Blaine County gained 916 residents between the July 2020 and July 2024 estimates, a rise of 3.8%. That ranks 39th 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, Blaine County recorded 810 births and 624 deaths, a natural change of +186. Net international migration added +734 and net domestic migration, people moving to or from other US counties, came to +90. The largest single component was international migration, which added 734 people.

24.3k202024.8k202125.2k202225.2k202325.3k2024
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
810
Deaths
624
Net international migration
+734
Net domestic migration
+90
Change, July 2023 to July 2024
+81

Where Blaine County is

The Census internal point of Blaine County is at 43.394200, -113.955400. 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 Blaine 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: Blaine County internal point. Dark pin: Boise.

Internal point

Decimal
43.394200, -113.955400
DMS
43°23'39.12"N 113°57'19.44"W
UTM
12N 260649.8E 4808834.4N
Geohash
9rwyygsjw
Plus code
85M892VV+MR

Towns in Blaine County

4 incorporated places of 1,000+ people have residents in Blaine County, 17,938 people together, or 71% of the county. Each figure counts only the part of the town inside Blaine County; towns marked "part" extend into another county. The largest is Hailey with 9,976.

  1. 01Hailey9,976
  2. 02Ketchum3,609
  3. 03Bellevue2,582
  4. 04Sun Valley1,771
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Blaine County

The Census 2024 county adjacency file lists 9 neighbors for Blaine County. The most populous is Bingham County, ID, with 50,889 residents. Distances run between Census internal points in a straight line.

Distance to Boise and the nearest big city

Boise is 114.3 miles W of Blaine County's internal point in a straight line. The nearest place of 100,000 or more is Boise City, ID (population 237,963), 114.9 miles away. The nearest place of 10,000 or more is Jerome, ID (population 13,481), 54.6 miles away.

Blaine County FIPS code

The FIPS code of Blaine County is 16013: state code 16 for Idaho plus county code 013. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $94,471.

Questions people ask

What is the population of Blaine County, Idaho?

The Census Vintage 2024 estimate for July 1, 2024 is 25,261. That is up 916 people (3.8%) from the July 2020 estimate of 24,345.

What is the FIPS code of Blaine County?

16013. The first two digits (16) are Idaho; the last three (013) identify the county.

What is the largest town in Blaine County?

Hailey, with 9,976 residents inside Blaine County in 2024.

Which counties border Blaine County?

9 county-equivalents border it in the Census 2024 adjacency file: Bingham County, ID; Elmore County, ID; Cassia County, ID; Minidoka County, ID; Power County, ID; Lincoln County, ID; Custer County, ID; Butte County, ID; Camas 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.