• county
  • FIPS 16083
  • Largest town: Twin Falls

Twin Falls County, Idaho

Twin Falls County had 96,509 residents in the Census Vintage 2024 estimate, on 1,921.7 square miles of land. It ranks 5th of 44 in Idaho by population and 13th by land area.

Population
96,509
#5 of 44 in Idaho · #643 in US
Area
1,921.7 sq mi
#13 of 44 in Idaho · #297 in US
Density
50 / sq mi
#9 of 44 in Idaho · #1,463 in US
Median household income
$66,664
#24 of 44 in Idaho · #1,237 in US

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

Twin Falls County within Idaho. Pin: Boise.

Measure from here

Tools and pages that start from Twin Falls County

Twin Falls County population, land area and income

Twin Falls County had 96,509 residents in the Census Vintage 2024 estimate, on 1,921.7 square miles of land. It ranks 5th of 44 in Idaho by population and 13th by land area. That works out to 50.2 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 Twin Falls County is 6.4 times that size.

Its SAIPE 2023 median household income of $66,664 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

96,509

3144th1st

643rd of 3,144 (US)

Land area

1,922 sq mi

3144th1st

297th of 3,144 (US)

Density

50.2 / sq mi

3144th1st

1463rd of 3,144 (US)

Median household income

$66,664

3143rd1st

1237th of 3,143 (US)

Rank within Idaho (44)

Population

96,509

44th1st

5th of 44 (ID)

Land area

1,922 sq mi

44th1st

13th of 44 (ID)

Density

50.2 / sq mi

44th1st

9th of 44 (ID)

Median household income

$66,664

44th1st

24th of 44 (ID)

How Twin Falls County's population changed since 2020

Twin Falls County gained 6,135 residents between the July 2020 and July 2024 estimates, a rise of 6.8%. That ranks 24th 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, Twin Falls County recorded 4,794 births and 4,100 deaths, a natural change of +694. Net international migration added +1,098 and net domestic migration, people moving to or from other US counties, came to +4,699. The largest single component was domestic migration, which added 4,699 people.

90.4k202092.4k202194.0k202295.4k202396.5k2024
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
4,794
Deaths
4,100
Net international migration
+1,098
Net domestic migration
+4,699
Change, July 2023 to July 2024
+1,105

Where Twin Falls County is

The Census internal point of Twin Falls County is at 42.352300, -114.665600. It sits in UTM zone 11N. The map shades Idaho's 44 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Twin Falls 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: Twin Falls County internal point. Dark pin: Boise.

Internal point

Decimal
42.352300, -114.665600
DMS
42°21'8.28"N 114°39'56.16"W
UTM
11N 692264.4E 4691532.3N
Geohash
9rw2ywp01
Plus code
85J7982M+WQ

Towns in Twin Falls County

5 incorporated places of 1,000+ people have residents in Twin Falls County, 70,100 people together, or 73% of the county. Each figure counts only the part of the town inside Twin Falls County; towns marked "part" extend into another county. The largest is Twin Falls with 55,589.

  1. 01Twin Falls55,589
  2. 02Kimberly5,592
  3. 03Buhl4,761
  4. 04Filer3,040
  5. 05Hansen1,118
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Twin Falls County

The Census 2024 county adjacency file lists 6 neighbors for Twin Falls County, including 1 across a state line. The most populous is Elko County, NV, with 54,363 residents. Distances run between Census internal points in a straight line.

Distance to Boise and the nearest big city

Boise is 117.4 miles NW of Twin Falls County's internal point in a straight line. The nearest place of 100,000 or more is Boise City, ID (population 237,963), 116.9 miles away. The nearest place of 10,000 or more is Twin Falls, ID (population 55,589), 18.0 miles away.

Twin Falls County FIPS code

The FIPS code of Twin Falls County is 16083: state code 16 for Idaho plus county code 083. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $66,664.

Questions people ask

What is the population of Twin Falls County, Idaho?

The Census Vintage 2024 estimate for July 1, 2024 is 96,509. That is up 6,135 people (6.8%) from the July 2020 estimate of 90,374.

What is the FIPS code of Twin Falls County?

16083. The first two digits (16) are Idaho; the last three (083) identify the county.

What is the largest town in Twin Falls County?

Twin Falls, with 55,589 residents inside Twin Falls County in 2024.

Which counties border Twin Falls County?

6 county-equivalents border it in the Census 2024 adjacency file: Elko County, NV; Elmore County, ID; Jerome County, ID; Cassia County, ID; Gooding County, ID; Owyhee 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.