US Census Data

Largest by population in Idaho

Idaho counties and cities ranked by population.

This page ranks the counties and cities of Idaho by population — which have the most people, according to the US Census Bureau's American Community Survey 5-year estimates.

Among counties, Ada County leads at 508,052.

Among cities & places, Boise City leads at 235,701.

Counties

#NamePopulation
1Ada County508,052
2Canyon County242,405
3Kootenai County177,736
4Bonneville County127,056
5Twin Falls County92,121
6Bannock County88,457
7Madison County53,578
8Bonner County49,456
9Bingham County48,993
10Nez Perce County42,477
11Latah County40,315
12Jefferson County32,234
13Elmore County29,046
14Payette County26,190
15Cassia County25,165
16Jerome County24,788
17Blaine County24,579
18Minidoka County21,922
19Gem County19,854
20Idaho County17,120
21Gooding County15,740
22Franklin County14,715
23Fremont County13,701
24Shoshone County13,580
25Boundary County12,695
26Owyhee County12,284
27Valley County12,136
28Teton County12,101
29Washington County10,866
30Benewah County9,913
31Clearwater County8,921
32Lemhi County8,166
33Boise County8,045
34Power County8,018
35Caribou County7,118
36Bear Lake County6,552
37Lincoln County5,276
38Oneida County4,681
39Adams County4,599
40Custer County4,411
41Lewis County3,649
42Butte County2,654
43Camas County1,155
44Clark County776

Cities & places

Top 100.
#NamePopulation
1Boise City235,701
2Meridian124,865
3Nampa106,289
4Idaho Falls66,672
5Caldwell63,465
6Pocatello57,152
7Coeur d'Alene55,558
8Twin Falls53,219
9Post Falls41,716
10Rexburg39,589
11Lewiston34,471
12Eagle31,490
13Kuna25,960
14Moscow25,868
15Ammon18,496
16Mountain Home16,265
17Hayden16,021
18Chubbuck15,900
19Star13,231
20Jerome12,689
21Blackfoot12,628
22Garden City12,483
23Burley11,721
24Rathdrum10,133
25Middleton10,101
26Hailey9,439
27Sandpoint9,244
28Payette8,358
29Emmett7,948
30Fruitland6,405
31Rupert6,157
32Weiser5,803
33Preston5,800
34Rigby5,251
35Shelley4,987
36Kimberly4,883
37American Falls4,636
38Buhl4,624
39McCall3,847
40St. Anthony3,818
41Lincoln3,759
42Gooding3,731
43Heyburn3,678
44Ketchum3,551
45Hidden Springs3,490
46Grangeville3,443
47Orofino3,254
48Mountain Home AFB3,198
49Salmon3,196
50Soda Springs3,150
51St. Maries3,032
52Victor3,024
53Homedale3,006
54Wendell2,940
55Iona2,882
56Filer2,837
57Montpelier2,681
58Driggs2,655
59Bonners Ferry2,615
60Bellevue2,571
61Dalton Gardens2,526
62Malad City2,441
63Aberdeen2,418
64Fort Hall2,343
65Kellogg2,232
66Priest River2,058
67Pinehurst2,014
68Sugar City2,011
69Shoshone1,985
70New Plymouth1,863
71Parma1,836
72Spirit Lake1,768
73Osburn1,728
74Wilder1,690
75Paul1,615
76Ucon1,537
77Tyhee1,475
78Ponderay1,456
79Glenns Ferry1,443
80Moyie Springs1,420
81Hansen1,414
82Moreland1,386
83Sun Valley1,383
84Grace1,345
85Ashton1,329
86Genesee1,312
87Avimor1,289
88Marsing1,245
89Robie Creek1,240
90Groveland1,204
91Hagerman1,198
92Carey1,197
93Greenleaf1,152
94Cottonwood1,138
95Wallace1,127
96Riverside1,126
97Kootenai1,076
98Plummer1,055
99Kamiah1,053
100Lapwai1,041

Nationwide

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Other rankings in Idaho

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