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Ismay
Montana›Custer County

IsmayMT

The town, settled in 1908, counts 21 residents.

Cottonwood Creek Bridge · Photo: Robstutz · CC BY-SA 4.0
Photo of Ismay

Ismay, MT · Cottonwood Creek Bridge · Photo: Robstutz · CC BY-SA 4.0

Is Ismay a good place to live?

100% of households own their home in Ismay, above both Montana’s towns (64%) and U.S. towns (73%). Ismay Jail and Cottonwood Creek Bridge is on the National Register of Historic Places. Ismay has fewer than 1,000 residents, too few for fair grades; the figures below are still real.

Small town

21 people, and everyone knows the way

In a town this size, neighbors are the best guide. Ask them anything.

Nearby towns
Ismay Jail
Ismay Jail · National Register of Historic Places
Ismay’s story

118 years in pictures

Census counts: 344 in 1920, 17 in 2020. The archive holds 2 old photos and papers going back to 2016 and 2 maps from 1953 on.

1 place on the National Register of Historic Places.

  • 1908Ismay is settled
Explore the history →
Getting set up

Moving to Ismay: who provides what

Who provides power, water and the rest in Ismay, and how to reach them.

The full setup list →
PowerTongue River Electric CoopEIAHIFLD · EIA
InternetProviders and speedsData pending · D4
Trash & dumpNot on file yetWe don’t have Ismay’s trash rules yet
SchoolsCuster County High School DistrictTrail Creek Elementary School District2 districts serve Ismay; which school depends on your address and gradeNCES
Register to voteIn personMontana has no online registration; you can register in person up to and including Election Day or by mail (postmarked 30 days before).vote.gov
Who runs elections hereCuster County Election AdministratorCuster County; contacts on the Handbook page.FVAP, Nov 2025
ZIP code5933659336 100%Census 2020

EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.

The data

Ordered by what stands out in Ismay.

Natural hazards

Top of a high hazard risk in Ismay: inland flooding

Expected losses in Ismay break down as 39% from inland flooding and 32% from cold waves. Compared with 70% of U.S. communities, expected storm and flood damage locally is higher. One declared disaster, in 2011, has brought federal aid to Ismay households.

70risk score of 100
FEMA risk score
70High riskLowerHigher
Inland floodingCold wavesWildfire
1
federal disasters paid out here

FEMA disaster declarations and aid · FEMA National Risk Index · OpenFEMA

Climate

Expect four seasons and pleasant summers in Ismay

Ismay’s typical July afternoon high is 88°F.

34″snow a winter

Typical low → high °F

Winter9–32°
Spring31–57°
Summer54–84°
Fall32–59°
Sep 20
typical first frost
May 21
typical last frost
+1.0°
vs. the 20th-century average

NOAA U.S. Climate Normals, 1991–2020

Health

How healthy Ismay is

Ismay: 30% of adults have obesity. CDC measures, 32 in all: Ismay beats Montana on 6 and trails on 1. Two figures for adults in the town: 72% had a checkup this year, 29% feel lonely.

IsmayMontana townsU.S. towns
Binge drink (CDC PLACES)20%20%16%
Yearly checkup (CDC PLACES)72%72%79%
Feel lonely (CDC PLACES)29%31%33%
Obesity (CDC PLACES)30%32%35%
32 measures vs. Montana
6 better25 too close to call1 worse
What stands outIsmayMT
Fewer older adults who have lost all their teeth8.3%12.3%
Fewer adults facing food insecurity9.4%11.7%
More adults who have had cancer10.3%9.3%
Fallon Medical Complex Hospital
29.3 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 Ismay

13pages on Ismay
After high school

Colleges nearby

None within 15 miles of Ismay; the nearest are

About Ismay

Town in Montana, United States

Ismay is a town in Custer County, Montana, United States. The population was 17 at the 2020 census. The town is the least-populous incorporated municipality in the state of Montana. The town's name is an amalgamation of Isabella and May, the names of the daughters of Albert J. Earling, division superintendent (later president) of the Chicago, Milwaukee and St. Paul Railway. Other communities with related names include Earling, Iowa; Marmarth, North Dakota; and Alberton, Montana. As a publicity stunt coordinated by Kansas City radio station KYYS in 1993, the town unofficially took the name of Joe, Montana, after the NFL quarterback Joe Montana. The town's history and contemporary state (circ…

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Established
1908
Area
0.4 sq mi
Elevation
2,526 ft
ZIP code
59336
Area code
406

Questions about Ismay

Short answers, built from the data on this page.

Is Ismay, MT a good place to live?

Ismay has fewer than 1,000 residents, too few for fair grades; the figures below are still real.