• county
  • FIPS 16039
  • Largest town: Mountain Home

Elmore County, Idaho

Elmore County had 29,729 residents in the Census Vintage 2024 estimate, on 3,075.1 square miles of land. It ranks 13th of 44 in Idaho by population and 6th by land area.

Population
29,729
#13 of 44 in Idaho · #1,451 in US
Area
3,075.1 sq mi
#6 of 44 in Idaho · #167 in US
Density
9.7 / sq mi
#23 of 44 in Idaho · #2,577 in US
Median household income
$64,247
#28 of 44 in Idaho · #1,433 in US

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

Elmore County within Idaho. Pin: Boise.

Measure from here

Tools and pages that start from Elmore County

Elmore County population, land area and income

Elmore County had 29,729 residents in the Census Vintage 2024 estimate, on 3,075.1 square miles of land. It ranks 13th of 44 in Idaho by population and 6th by land area. That works out to 9.7 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; Elmore County is somewhat larger.

Its SAIPE 2023 median household income of $64,247 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

29,729

3144th1st

1451st of 3,144 (US)

Land area

3,075 sq mi

3144th1st

167th of 3,144 (US)

Density

9.7 / sq mi

3144th1st

2577th of 3,144 (US)

Median household income

$64,247

3143rd1st

1433rd of 3,143 (US)

Rank within Idaho (44)

Population

29,729

44th1st

13th of 44 (ID)

Land area

3,075 sq mi

44th1st

6th of 44 (ID)

Density

9.7 / sq mi

44th1st

23rd of 44 (ID)

Median household income

$64,247

44th1st

28th of 44 (ID)

How Elmore County's population changed since 2020

Elmore County gained 1,049 residents between the July 2020 and July 2024 estimates, a rise of 3.7%. That ranks 40th 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, Elmore County recorded 1,910 births and 1,072 deaths, a natural change of +838. Net international migration added +607 and net domestic migration, people moving to or from other US counties, came to -397. The largest single component was natural change, which added 838 people.

28.7k202029.0k202129.5k202229.7k202329.7k2024
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
1,910
Deaths
1,072
Net international migration
+607
Net domestic migration
-397
Change, July 2023 to July 2024
+23

Where Elmore County is

The Census internal point of Elmore County is at 43.394700, -115.471200. 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 Elmore 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: Elmore County internal point. Dark pin: Boise.

Internal point

Decimal
43.394700, -115.471200
DMS
43°23'40.92"N 115°28'16.32"W
UTM
11N 623810.2E 4805782.0N
Geohash
9rtyu7u2q
Plus code
85M69GVH+VG

Towns in Elmore County

2 incorporated places of 1,000+ people have residents in Elmore County, 18,200 people together, or 61% of the county. Each figure counts only the part of the town inside Elmore County; towns marked "part" extend into another county. The largest is Mountain Home with 16,912.

  1. 01Mountain Home16,912
  2. 02Glenns Ferry1,288
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Elmore County

The Census 2024 county adjacency file lists 8 neighbors for Elmore County. The most populous is Ada County, ID, with 535,799 residents. Distances run between Census internal points in a straight line.

Distance to Boise and the nearest big city

Boise is 40.3 miles WNW of Elmore County's internal point in a straight line. The nearest place of 100,000 or more is Boise City, ID (population 237,963), 40.6 miles away. The nearest place of 10,000 or more is Mountain Home, ID (population 16,912), 21.4 miles away.

Elmore County FIPS code

The FIPS code of Elmore County is 16039: state code 16 for Idaho plus county code 039. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $64,247.

Questions people ask

What is the population of Elmore County, Idaho?

The Census Vintage 2024 estimate for July 1, 2024 is 29,729. That is up 1,049 people (3.7%) from the July 2020 estimate of 28,680.

What is the FIPS code of Elmore County?

16039. The first two digits (16) are Idaho; the last three (039) identify the county.

What is the largest town in Elmore County?

Mountain Home, with 16,912 residents inside Elmore County in 2024.

Which counties border Elmore County?

8 county-equivalents border it in the Census 2024 adjacency file: Ada County, ID; Twin Falls County, ID; Blaine County, ID; Gooding County, ID; Owyhee County, ID; Boise County, ID; Custer 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.