US Census Data

Youngest by median age in Idaho

Idaho counties and cities ranked by median age.

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

Among counties, Madison County leads at 21.4 yrs.

Among cities & places, Moore leads at 17.8 yrs.

Counties

#NameMedian age
1Madison County21.4 yrs
2Latah County30.7 yrs
3Jefferson County32.3 yrs
4Elmore County32.5 yrs
5Franklin County32.5 yrs
6Cassia County33.1 yrs
7Bonneville County33.3 yrs
8Clark County33.4 yrs
9Jerome County33.6 yrs
10Power County33.9 yrs
11Minidoka County34.5 yrs
12Bingham County34.8 yrs
13Canyon County34.8 yrs
14Camas County34.9 yrs
15Bannock County35.0 yrs
16Twin Falls County35.8 yrs
17Lincoln County37.2 yrs
18Caribou County38.0 yrs
19Ada County38.3 yrs
20Owyhee County38.3 yrs
21Gooding County38.4 yrs
22Payette County38.8 yrs
23Butte County39.2 yrs
24Teton County39.8 yrs
25Fremont County39.9 yrs
26Bear Lake County40.2 yrs
27Oneida County40.2 yrs
28Kootenai County40.8 yrs
29Nez Perce County40.9 yrs
30Boundary County42.8 yrs
31Gem County42.8 yrs
32Washington County44.6 yrs
33Shoshone County45.1 yrs
34Blaine County45.5 yrs
35Benewah County46.0 yrs
36Bonner County48.2 yrs
37Lewis County48.9 yrs
38Valley County49.0 yrs
39Idaho County49.6 yrs
40Clearwater County52.0 yrs
41Lemhi County53.1 yrs
42Boise County53.5 yrs
43Adams County54.3 yrs
44Custer County59.5 yrs

Cities & places

Top 100.
#NameMedian age
1Moore17.8 yrs
2Rockford17.9 yrs
3Minidoka21.0 yrs
4Rexburg21.0 yrs
5De Smet21.5 yrs
6Mountain Home AFB22.4 yrs
7Clifton22.9 yrs
8Moscow25.3 yrs
9Franklin25.5 yrs
10Weston26.0 yrs
11Eden26.5 yrs
12Heyburn26.6 yrs
13Dietrich27.3 yrs
14Aberdeen28.1 yrs
15Iona28.1 yrs
16Lincoln29.0 yrs
17Mud Lake29.1 yrs
18Burley29.2 yrs
19Moreland29.3 yrs
20Groveland29.4 yrs
21Shelley29.4 yrs
22Carey29.6 yrs
23Sugar City29.7 yrs
24Oldtown30.0 yrs
25Ririe30.0 yrs
26Tetonia30.0 yrs
27Wilder30.7 yrs
28Caldwell30.8 yrs
29Homedale30.9 yrs
30Rigby30.9 yrs
31Tyhee30.9 yrs
32Jerome31.0 yrs
33Melba31.0 yrs
34Lapwai31.1 yrs
35Wardner31.1 yrs
36Mountain Home31.4 yrs
37Georgetown31.5 yrs
38Murtaugh31.5 yrs
39New Meadows31.6 yrs
40Rupert31.7 yrs
41Notus31.8 yrs
42Roberts31.8 yrs
43Hazelton31.9 yrs
44Kuna31.9 yrs
45Plummer31.9 yrs
46Kimberly32.1 yrs
47Riverside32.1 yrs
48New Plymouth32.4 yrs
49American Falls32.5 yrs
50Ammon32.5 yrs
51Filer32.5 yrs
52Huetter32.6 yrs
53Paul32.6 yrs
54Shoshone32.7 yrs
55St. Anthony32.7 yrs
56Paris32.8 yrs
57Parker32.8 yrs
58Pocatello32.9 yrs
59Oakley33.0 yrs
60Victor33.0 yrs
61Gooding33.1 yrs
62Genesee33.2 yrs
63Dayton33.5 yrs
64Idaho Falls33.5 yrs
65Potlatch33.9 yrs
66Nampa34.1 yrs
67Twin Falls34.1 yrs
68Middleton34.3 yrs
69Moyie Springs34.4 yrs
70Preston34.5 yrs
71Post Falls34.6 yrs
72Fairfield34.7 yrs
73Inkom34.7 yrs
74Payette34.8 yrs
75Arimo34.9 yrs
76Fruitland34.9 yrs
77Hollister34.9 yrs
78Teton34.9 yrs
79Oxford35.0 yrs
80Bruneau35.3 yrs
81Hansen35.4 yrs
82Montpelier35.4 yrs
83Worley35.4 yrs
84Buhl35.5 yrs
85Kellogg35.5 yrs
86Rockland35.5 yrs
87Blackfoot35.6 yrs
88Onaway35.6 yrs
89Chubbuck35.7 yrs
90Richfield35.7 yrs
91Rathdrum35.8 yrs
92Soda Springs35.9 yrs
93Newdale36.3 yrs
94Basalt36.5 yrs
95Reubens36.5 yrs
96Downey36.6 yrs
97Grace36.7 yrs
98Kootenai36.7 yrs
99Cottonwood36.8 yrs
100Garden Valley36.8 yrs

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