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Idaho
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Biggest US Cities
Highest Population Density In Idaho By County
People per square mile
Rank
County
Population Density
1
Ada County, Idaho
372.8
2
Canyon County, Idaho
321.6
3
Kootenai County, Idaho
111.3
4
Madison County, Idaho
80
5
Bannock County, Idaho
74.5
6
Bonneville County, Idaho
55.9
7
Payette County, Idaho
55.6
8
Nez Perce County, Idaho
46.3
9
Twin Falls County, Idaho
40.2
10
Jerome County, Idaho
37.5
11
Latah County, Idaho
34.6
12
Gem County, Idaho
29.8
13
Minidoka County, Idaho
26.5
14
Jefferson County, Idaho
23.9
15
Bonner County, Idaho
23.6
16
Teton County, Idaho
22.6
17
Bingham County, Idaho
21.8
18
Gooding County, Idaho
21.2
19
Franklin County, Idaho
19.3
20
Benewah County, Idaho
12
21
Cassia County, Idaho
8.9
22
Elmore County, Idaho
8.8
23
Boundary County, Idaho
8.6
24
Blaine County, Idaho
8.1
25
Lewis County, Idaho
8
26
Fremont County, Idaho
7.1
27
Washington County, Idaho
7
28
Bear Lake County, Idaho
6.1
29
Power County, Idaho
5.6
30
Shoshone County, Idaho
4.9
31
Lincoln County, Idaho
4.3
32
Caribou County, Idaho
3.9
33
Boise County, Idaho
3.7
34
Oneida County, Idaho
3.6
35
Clearwater County, Idaho
3.6
36
Adams County, Idaho
2.9
37
Valley County, Idaho
2.7
38
Idaho County, Idaho
1.9
39
Lemhi County, Idaho
1.7
40
Owyhee County, Idaho
1.5
41
Butte County, Idaho
1.3
42
Camas County, Idaho
1
43
Custer County, Idaho
0.9
44
Clark County, Idaho
0.6
Population Density By
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Business Lists
Most Building Permits
Most Employees of Private Non-Farm Establishments
Most Private Non-Farm Establishments
Highest Total Retail Sales
Highest Retail Sales Per Capita
Most Businesses
Education Lists
Highest Percentage with College Degree
Highest Percentage with High School Diploma
Housing Lists
Most Households
Highest Home Ownership Percentage
Highest Percentage of Residents Living In Multi-Unit Buildings
Highest Median Home Value
Highest Average People Per Household
Most Housing Units
Income Lists
Highest Income Per Capita
Highest Income Per Household
Highest People Below The Poverty Rate
People Lists
Highest Percentage of Minors
Highest Percentage of Seniors
Highest Percentage of Young Children
Highest Percentage of Female Residents
Highest Percentage of Foreign Born Residents
Race Lists
Highest Percentage of American Indian or Alaska Native Residents
Highest Percentage of Asian Residents
Highest Percentage of Black or African American Residents
Highest Percentage of Hispanic or Latino Residents
Highest Percentage of Native Hawaiian/Pacific Islander Residents
Highest Percentage of Residents With Two or More Races
Highest Percentage of White Residents
Highest Percentage White, Not Hispanic or Latino, Residents
Size Lists
Highest Land Area
Highest Population (2012)
Highest Population Density
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• Last updated: Jan 2, 2025