Mammoth, Wyoming Demographics & Population 2026

A note before these figures: with a population of 62, Mammoth's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Mammoth is a small community located in Wyoming, within Park County. The total population is 62. It ranks as the 168th most populous out of 192 Census-designated places in Wyoming.

Age Demographics

The median age in Mammoth is 58.3 years. This is 49% higher than the state median of 39.1 years. 46.8% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The poverty rate stands at 25.8%. This is 145% higher than the state poverty rate of 10.5%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in Mammoth, which reflects the size of the sample rather than a labor market without joblessness. Every occupied housing unit the survey reached in Mammoth was renter-occupied. At this sample size that indicates no owner-occupied homes were captured rather than that none exist.

Race & Ethnicity

Mammoth has a predominantly White (non-Hispanic) population, comprising 95.2% of all residents.

Education

71.1% of residents aged 25 and older hold a bachelor's degree or higher. This places Mammoth in the top 10% of all cities in the state for educational attainment. This is 133% higher than the state rate of 30.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.

Data Sources & Methodology

All demographic data for Mammoth, Wyoming is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Wyoming state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 192 Census-designated places in Wyoming. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.