PlainCities

Ranking · Idaho

Fastest-growing and fastest-shrinking places in Idaho

Star has the highest population change, 2020 to 2025 of Idaho's 83 ranked places (+84.6%); Glenns Ferry has the lowest (−2.0%). Ranked: places with 1,000 or more residents in the 2020 Census that are incorporated (the Census Bureau estimates only those each year).

Which are the fastest-growing places?

Fastest-growing places in Idaho, first to fifth: Star (+84.6%), Ponderay (+56.2%), Paul (+44.3%), Sugar City (+43.8%) and Rathdrum (+43.6%).

Fastest-growing places in Idaho, by population change, 2020 to 2025.
RankPlaceTypePopulation change, 2020 to 2025ResidentsCounty
1 Starcity +84.6% 20,874Ada County and 1 more
2 Ponderaycity +56.2% 2,024Bonner County
3 Paulcity +44.3% 1,722Minidoka County
4 Sugar Citycity +43.8% 2,476Madison County
5 Rathdrumcity +43.6% 13,227Kootenai County
6 Middletoncity +33.3% 12,600Canyon County
7 Kunacity +30.8% 31,525Ada County
8 Caldwellcity +27.4% 76,629Canyon County
9 Kimberlycity +25.4% 5,798Twin Falls County
10 Sandpointcity +23.0% 10,645Bonner County
11 Meridiancity +21.4% 142,988Ada County
12 Post Fallscity +21.0% 46,715Kootenai County
13 Victorcity +20.1% 2,589Teton County
14 Nampacity +19.9% 120,384Canyon County
15 Fruitlandcity +18.7% 7,213Payette County
16 Driggscity +18.4% 2,403Teton County
17 Ionacity +16.6% 3,179Bonneville County
18 Emmettcity +15.9% 8,900Gem County
19 Rigbycity +14.2% 5,757Jefferson County
20 Ammoncity +13.5% 20,119Bonneville County
21 Franklincity +12.8% 1,155Franklin County
22 McCallcity +12.4% 4,133Valley County
23 Prestoncity +12.0% 6,177Franklin County
24 Plummercity +11.7% 1,130Benewah County
25 Haydencity +11.6% 17,363Kootenai County

Source: Census Bureau population estimates, Vintage 2025 (SUB-EST2025) · Census population estimates

Which are the fastest-shrinking places?

Fastest-shrinking places in Idaho, first to fifth: Glenns Ferry (−2.0%), Dalton Gardens (−1.5%), Sun Valley (−0.4%), Marsing (+0.7%) and Orofino (+1.0%).

Fastest-shrinking places in Idaho, by population change, 2020 to 2025.
RankPlaceTypePopulation change, 2020 to 2025ResidentsCounty
83 Glenns Ferrycity −2.0% 1,256Elmore County
82 Dalton Gardenscity −1.5% 2,496Kootenai County
81 Sun Valleycity −0.4% 1,776Blaine County
80 Marsingcity +0.7% 1,230Owyhee County
79 Orofinocity +1.0% 3,259Clearwater County
78 Boise Citycity +1.1% 238,429Ada County
77 Soda Springscity +1.3% 3,165Caribou County
76 Rexburgcity +1.4% 40,334Madison County
75 Lewistoncity +1.5% 34,717Nez Perce County
74 Bellevuecity +1.5% 2,597Blaine County
73 Kamiahcity +1.5% 1,134Lewis County and 1 more
72 Hansencity +1.6% 1,109Twin Falls County
71 Malad Citycity +1.7% 2,338Oneida County
70 Cascadecity +2.1% 1,018Valley County
69 Montpeliercity +2.4% 2,710Bear Lake County
68 Uconcity +2.5% 1,196Bonneville County
67 Ketchumcity +2.9% 3,643Blaine County
66 Heyburncity +3.4% 3,783Minidoka County
65 Lapwaicity +3.6% 1,251Nez Perce County
64 Pocatellocity +3.6% 58,771Bannock County
63 St. Mariescity +4.0% 2,457Benewah County
62 Goodingcity +4.1% 3,855Gooding County
61 Mountain Homecity +4.6% 16,779Elmore County
60 American Fallscity +4.8% 4,785Power County
59 Moscowcity +4.9% 26,721Latah County

Source: Census Bureau population estimates, Vintage 2025 (SUB-EST2025) · Census population estimates

How is this ranking made?

Each place's population change, 2020 to 2025 is read from the Census Bureau's April 1, 2020 estimates base and its July 1, 2025 estimate. A place enters the ranking if it had 1,000 or more residents in the 2020 Census and is incorporated. Ties in the published figure share a rank. This is a measurement of one figure, not a judgment of a place.

Source: PlainCities ranking method applied to the Census Bureau population estimates, Vintage 2025 (SUB-EST2025) · How ranks are computed

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections