US Post Office-Yellowstone Main · National Register of Historic Places
Mammoth’s story
Mammoth in pictures
2 places on the National Register of Historic Places.
Explore the history →
MammothWY
A town of 62.
Obsidian Cliff · Photo: USGS · Public domain
Is Mammoth a good place to live?
71% of adults 25 and older hold a bachelor’s degree or more in Mammoth, above both Wyoming’s towns (24%) and U.S. towns (29%). 100% of the land in Mammoth is conserved, against 8.8% in Wyoming’s towns and 4.3% across U.S. towns. Mammoth has 2 places on the National Register of Historic Places, among them Obsidian Cliff and Madison Museum. Mammoth has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
Small town
62 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
Nearby attractions
All 22 attractions →Yellowstone National Park and 12 more within 40 miles
Museums, parks, gardens and other places to visit around Mammoth. Close and well known come first.
Big drawin town National ParkYellowstone National Park4.8M visitors a year
Big draw40 mi MountainYellowstone volcano
39 mi LakeYellowstone Lake
4 mi LandmarkRoosevelt Arch
35 mi LakeQuake Lake
20 mi Canyon & gorgeGrand Canyon of the YellowstoneSources: National Park Service · ski areas © OpenSkiMap / OpenStreetMap contributors · Wikidata · Wikipedia readership · photos via Wikimedia Commons
Photo credits
Yellowstone National Park: James St. John from Newark, Ohio, CC BY 2.0 · Yellowstone volcano: Ed Austin/Herb Jones, Public domain · Yellowstone Lake: NASA, Public domain · Roosevelt Arch: Yellowstone National Park, Public domain · Quake Lake: Staplegunther at English Wikipedia, CC BY-SA 3.0 · Grand Canyon of the Yellowstone: Brocken Inaglory, CC BY-SA 3.0
Getting set up
Moving to Mammoth: who provides what
Mammoth is unincorporated, so Park County and regional agencies provide most services.
PowerNorthWestern Energy12.4¢/kWh · EIA 2025HIFLD · EIA
WaterYnp-Mammoth Hot Springs water systemNo health-based violations in 5 years · EPAEPA
InternetProviders and speedsData pending · D4
Trash & county servicesPark CountyPark County provides services here
Register to voteIn personWyoming has no online registration; you can register in person up to and including Election Day or by mail (received 14 days before).vote.govWho runs elections herePark County ClerkPark County; contacts on the Handbook page.FVAP, Dec 2023
ZIP code8219082190 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 Mammoth.
Outdoors
Conserved land covers nearly a third of Mammoth
2.3 miles of trail in 0 parks and preserves. Mammoth’s trail density is 2.9 miles per square mile.
100%conserved
100%
conserved · 503 of 503 acres
2.3 mi
of trails · 2.9 per sq mi
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Natural hazards
Very high risk in Mammoth, with inland flooding at the top
Expected storm and flood damage is higher than in 84% of U.S. communities.
84risk score of 100
FEMA risk score
Inland floodingAvalanchesCold waves
FEMA National Risk Index · OpenFEMA
Work & commute
Compared with most of Wyoming and the rest of the country, more of Mammoth’s residents live below the poverty line
26% of Mammoth residents live below the poverty line. No town among the 29 in Wyoming we compare has a lower average trip to work than Mammoth. Most working residents leave Mammoth for work: only 0% work in town.
0%work in town
| Mammoth | Wyoming towns | U.S. towns | |
|---|---|---|---|
| Below the poverty line | 26% | 10% | 9.6% |
| Average trip to work | 8 minutes | 15 minutes | 25 minutes |
Where working residents work
In Mammoth0%
Cody52%
Cheyenne3%
Lyman2%
Evanston2%
86 mi
median commute distance
45
jobs based in Mammoth
A commuter town
jobs vs. working residents
Census LEHD 2023 · ACS
Climate
Mammoth has snowy winters and pleasant summers
Mammoth has cold, snowy winters and pleasant summers, with very little rain. The July high in Mammoth is 81°F.
72″snow a winter
Typical low → high °F
Winter11–31°
Spring25–51°
Summer43–77°
Fall27–54°
Sep 14
typical first frost
Jun 3
typical last frost
+1.1°
vs. the 20th-century average
NOAA U.S. Climate Normals, 1991–2020
Health
How healthy Mammoth is
Mammoth beats the Wyoming average on 4 of 31 CDC measures and trails it on 2. 66% of adults had a checkup this year in Mammoth.
| Mammoth | Wyoming towns | U.S. towns | |
|---|---|---|---|
| Yearly checkup (CDC PLACES) | 66% | 68% | 79% |
| High blood pressure (CDC PLACES) | 28% | 31% | 35% |
| Diabetes (CDC PLACES) | 9.5% | 11% | 12% |
| Binge drink (CDC PLACES) | 17% | 16% | 16% |
31 measures vs. Wyoming
4 better25 too close to call2 worse
| What stands out | Mammoth | WY |
|---|---|---|
| Fewer older adults who have lost all their teeth | 7.7% | 12.8% |
| Fewer adults with heart disease | 4.8% | 6.5% |
| More adults facing housing insecurity | 10.9% | 9.2% |
Bozeman Health Big Sky Medical Center
38.8 mi away · emergency room
1 of 3
care shortages: mental health
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Keep exploring
Everything we know about Mammoth
15pages on Mammoth
The big questions
Out and about
Day to day
After high school
Colleges nearby
None within 15 miles of Mammoth; the nearest are
Montana State UniversityUniversity or college · Public · Bozeman, MT50.9 mi$8,460 in-state tuitionHighlands College of Montana TechCommunity college · Public · Butte, MT110.4 mi$4,130 in-state tuition
College town 21 of every 100 Mammoth residents are enrolled in college, against 6 across Wyoming.
A commuter town
100% of working residents leave Mammoth for work
Where Mammoth’s working residents go each day. Line width shows the share.
45jobs based in Mammoth
0%of working residents work in town
86 mimedian commute distance
Census LEHD 2023
Landmarks
2 places in Mammoth on the National Register of Historic Places.
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About Mammoth
Census-designated place in Wyoming, United States
Mammoth is a census-designated place in Park County, Wyoming, United States, in Yellowstone National Park. As of the 2010 census, its population was 263.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 0.8 sq mi
- Elevation
- 6,250 ft
Questions about Mammoth
Short answers, built from the data on this page.
Is Mammoth, WY a good place to live?
Mammoth has fewer than 1,000 residents, too few for fair grades; the figures below are still real.