IDMap-doton-WarmRiver, 2004
Warm River’s story
119 years in pictures
Census counts: 20 in 1960, a low of 2 in 1980, 4 in 2020. The archive holds 1 old photo or paper going back to 2004 and a map from 1965 on.
- 1907Warm River is settled
Warm RiverID
A town of 1, settled in 1907.
Big Falls Inn · Photo: Kathleen Pilley · CC BY-SA 3.0
Population
1
2025 Census estimate · +0% since 2020
Land area
1 sq mi
Is Warm River a good place to live?
Warm River has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
Small town
1 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
Nearby towns
Getting set up
The full setup list →Moving to Warm River: who provides what
Who provides power, water and the rest in Warm River, and how to reach them.
PowerFall River Rural Elec Coop11.1¢/kWh · EIA 2025HIFLD · EIA
Internet2 providers100% of addresses get 100/20 MbpsFCC
Trash & dumpNot on file yetWe don’t have Warm River’s trash rules yet
Register to voteOnlineIn Idaho you can register online until 11 days before Election Day, in person up to and including Election Day, or by mail (received 11 days before).vote.govWho runs elections hereFremont County ClerkFremont County; contacts on the Handbook page.FVAP, Feb 2024
ZIP code8342083420 100%Census 2020
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Sep 12, 2025.
The data
Ordered by what stands out in Warm River.
Natural hazards
Warm River faces a very high natural-hazard risk, led by inland flooding
The FEMA risk score for Warm River comes to 82 of 100. FEMA puts 43% of the town’s expected hazard losses down to inland flooding, and 30% to avalanches.
82risk score of 100
FEMA risk score
Inland floodingAvalanchesWildfire
FEMA National Risk Index · OpenFEMA
Climate
Warm River: snowy winters and pleasant summers
The town’s peak summer temperature is 82°F, below both Idaho’s towns (89°F) and U.S. towns (85°F).
70″snow a winter
Typical low → high °F
Winter12–30°
Spring28–53°
Summer46–79°
Fall29–56°
Sep 21
typical first frost
May 21
typical last frost
+1.4°
vs. the 20th-century average
NOAA U.S. Climate Normals, 1991–2020
Health
How healthy Warm River is
Among 60 Idaho towns, just 6 have a higher share of adults who had a checkup this year than Warm River. Against the Idaho average, Warm River comes out ahead on 7 CDC measures out of 32, and behind on 3. Warm River: 28% of adults feel lonely, below both the Idaho town median (30%) and the median of U.S. towns (33%), and 14% of Warm River adults report frequent mental distress.
| Warm River | Idaho towns | U.S. towns | |
|---|---|---|---|
| Feel lonely (CDC PLACES) | 28% | 30% | 33% |
| Frequent mental distress (CDC PLACES) | 14% | 17% | 17% |
| Sleep under 7 hours (CDC PLACES) | 31% | 34% | 36% |
| Depression (CDC PLACES) | 21% | 23% | 23% |
32 measures vs. Idaho
7 better22 too close to call3 worse
| What stands out | Warm River | ID |
|---|---|---|
| Fewer older adults who have lost all their teeth | 11.5% | 16.2% |
| Fewer adults without reliable transportation | 6.1% | 7.5% |
| More adults who have had cancer | 10.3% | 8.3% |
Teton Valley Hospital
29.2 mi away · emergency room
2 of 3
care shortages: primary care, mental health
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Keep exploring
Everything we know about Warm River
14pages on Warm River
The big questions
Out and about
Day to day
After high school
Colleges nearby
None within 15 miles of Warm River; the nearest are
About Warm River
City in Idaho, United States
Warm River is a city in Fremont County, Idaho, United States. The population was 4 at the 2020 census, making it the least populous city in Idaho. It is part of the Rexburg, Idaho Micropolitan Statistical Area.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 0.7 sq mi
- Elevation
- 5,295 ft
- Area code
- 208
Questions about Warm River
Short answers, built from the data on this page.
Is Warm River, ID a good place to live?
Warm River has fewer than 1,000 residents, too few for fair grades; the figures below are still real.