Town · Wyoming
Thermopolis, Wyoming
Thermopolis, town, in Hot Springs County, Wyoming. Thermopolis had 2,721 residents on July 1, 2025 by the Census Bureau's estimate, down 0.4% since 2020; the 2020 Census counted 2,725 and the ACS 2020-2024 5-year estimates put it at 2,709 (±231). GEOID 5676515.
Residents, July 2025 estimate
2,721
Census Bureau estimate (no margin published)
2020 Census count: 2,725 · ACS 2020-2024: 2,709 ±231
Median household income
$65,208
±$25,048 (90% margin)
Wyoming: $76,176
Median home value
$211,400
±$16,096 (90% margin)
Wyoming: $309,700
Median gross rent
$835
±$172 (90% margin)
Wyoming: $992
Where is Thermopolis and what county is it in?
Thermopolis is a town in Hot Springs County, Wyoming. It covers 2.4 square miles of land, 1,141 residents per square mile in 2020.
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Thermopolis, and is it growing?
The Census Bureau estimates that 2,721 people lived in Thermopolis on July 1, 2025, down 0.4% since 2020, while Wyoming grew 2.1%. The 2020 Census counted 2,725 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 2,709 (±231).
| Measure | Thermopolis | Hot Springs County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 2,709 ±231 | 4,620 | no clear change |
| Households | 1,290 ±153 | 2,140 | no clear change |
| Average household size | 2.03 ±0.18 | 2.12 | no clear change |
| Housing units | 1,496 ±110 | 2,461 | no clear change |
Thermopolis's population since 2000
From 3,172 in 2000 to 2,721 in 2025: down 14.2%. The 2000, 2010 and 2020 figures are census counts, each for Thermopolis as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Thermopolis?
The median resident of Thermopolis is 40.5 years old; 22.3% are under 18 and 24.1% are 65 or older. The largest group is non-Hispanic white residents at 89.7%, then Hispanic or Latino residents (of any race) at 5.9%.
| Measure | Thermopolis | Hot Springs County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 40.5 ±5.2 | 43.3 | no clear change |
| Under 18 years | 22.3% ±4.0 pts | 22.6% | – |
| 65 years and over | 24.1% ±4.7 pts | 26.2% | – |
| Male | 49.3% ±3.9 pts | 50.8% | – |
| Hispanic or Latino (any race) | 5.9% ±3.0 pts | 4.0% | – |
| White alone, not Hispanic | 89.7% ±4.0 pts | 89.5% | −6.4 pts |
| Black or African American alone, not Hispanic | 0.0% ±1.4 pts | 0.0% | – |
| Asian alone, not Hispanic | 0.1% ±0.1 pts | 0.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.3% ±0.5 pts | 0.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.4 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.1% ±2.0 pts | 5.3% | – |
| Some other race alone, not Hispanic | 1.0% ±1.2 pts | 0.6% | – |
| Born outside the United States | 2.4% ±2.0 pts | 1.7% | – |
| Speak a language other than English at home (age 5+) | 2.9% ±2.4 pts | 1.9% | – |
| Civilian veterans (age 18+) | 9.6% ±3.5 pts | 9.9% | – |
| With a disability | 16.2% ±5.2 pts | 18.1% | – |
| No health insurance coverage | 13.1% ±4.4 pts | 11.8% | no clear change |
| High school graduate or higher (age 25+) | 95.5% ±3.0 pts | 95.4% | – |
| Bachelor's degree or higher (age 25+) | 29.3% ±6.2 pts | 26.7% | no clear change |
| Graduate or professional degree (age 25+) | 8.2% ±4.0 pts | 9.9% | – |
| Lived in the same house a year earlier | 82.9% ±7.6 pts | 86.9% | – |
| Moved from another state in the past year | 2.0% ±1.9 pts | 2.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Thermopolis earn?
Half of Thermopolis's 1,290 households earn less than $65,208 a year (±$25,048), against $61,250 in Hot Springs County and $76,176 in Wyoming. In 2015-2019 it was $65,426 in 2024 dollars; the margins of error cannot tell the two periods apart. 18.6% of residents live below the poverty line.
| Measure | Thermopolis | Hot Springs County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $65,208 ±$25,048 | $61,250 | no clear change |
| Mean household income | $75,269 ±$10,803 | $73,511 | – |
| Per capita income | $34,536 ±$5,370 | $33,214 | no clear change |
| People below the poverty line | 18.6% ±8.9 pts | 14.7% | no clear change |
| Children under 18 below the poverty line | 37.0% ±23.6 pts | 24.5% | – |
| Households receiving SNAP | 6.9% ±5.3 pts | 7.9% | – |
| Households with a computer | 97.1% ±2.9 pts | 94.9% | – |
| Households with a broadband subscription | 95.3% ±3.3 pts | 91.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Thermopolis?
Owners occupy 73.1% of Thermopolis's occupied homes and renters 26.9%. The median owner-occupied home is valued at $211,400 by its owner (±$16,096). The median renter pays $835 a month including utilities, and 47.1% of renters pay 35% or more of their income on rent.
| Measure | Thermopolis | Hot Springs County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $211,400 ±$16,096 | $227,500 | +$40,457 |
| Median gross rent | $835 ±$172 | $887 | no clear change |
| Renters paying 35% or more of income on rent | 47.1% ±27.9 pts | 37.2% | – |
| Median monthly owner costs, with a mortgage | $1,324 ±$114 | $1,378 | – |
| Owner-occupied homes | 73.1% ±8.1 pts | 72.7% | no clear change |
| Renter-occupied homes | 26.9% ±8.1 pts | 27.3% | – |
| Housing units | 1,496 ±110 | 2,461 | no clear change |
| Homeowner vacancy rate | 0.0% ±3.9 pts | 0.0% | – |
| Rental vacancy rate | 7.0% ±11.0 pts | 5.2% | – |
| Single-family detached homes | 75.9% ±7.1 pts | 72.0% | – |
| Mobile homes | 10.8% ±5.8 pts | 17.9% | – |
| Built 2020 or later | 0.0% ±2.5 pts | 0.4% | – |
| Built 2010 to 2019 | 2.4% ±2.7 pts | 3.2% | – |
| Built 1939 or earlier | 18.2% ±7.6 pts | 12.4% | – |
| Households with no vehicle | 1.6% ±2.4 pts | 3.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Thermopolis building?
Builders took permits for 0 new housing units in Thermopolis in 2025 (0 in single-family houses), 0.0 per 1,000 residents against 3.8 across Wyoming.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Thermopolis work and get to work?
75.2% of Thermopolis's workers drive alone. The average trip to work takes 13.9 minutes.
| Measure | Thermopolis | Hot Springs County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 56.9% ±6.0 pts | 55.7% | – |
| Unemployment rate | 1.1% ±1.9 pts | 2.9% | – |
| Drove alone to work | 75.2% ±9.5 pts | 72.8% | – |
| Carpooled | 7.6% ±6.5 pts | 10.5% | – |
| Public transportation | 0.0% ±3.1 pts | 0.0% | – |
| Walked | 9.3% ±8.9 pts | 6.1% | – |
| Worked from home | 6.5% ±4.3 pts | 9.9% | – |
| Mean travel time to work | 13.9 min ±5.5 | 13.8 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Thermopolis?
1 census tract lies mostly in Thermopolis, and 1 more reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9678Hot Springs County | 2,631 | $65,260 |
| Tract 9679Hot Springs County | 1,989 | $58,472 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Thermopolis) · Census block assignment files
How does Thermopolis compare with other places in Wyoming?
By the Census Bureau's July 2025 estimates, Thermopolis is the 6,643rd-most populous of the 19,476 U.S. incorporated places that have one and the 24th-most populous of 99 in Wyoming.
Thermopolis ranks 35th of 54 places in Wyoming with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 24th | 99 |
| Growth 2020-2025 (PEP) | 27th | 42 |
| Residents per square mile | 23rd | 56 |
| Median household income | 35th | 54 |
| Per capita income | 41st | 56 |
| Median home value | 41st | 53 |
| Median gross rent | 32nd | 48 |
| Poverty rate | 5th | 34 |
| Bachelor's degree or higher | 23rd | 54 |
| Median age | 21st | 56 |
| Owner-occupied share | 23rd | 55 |
| Travel time to work | 39th | 56 |
Thermopolis's figures with every place in Wyoming (CSV)
Every place in Wyoming, sortable · Compare Thermopolis with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Thermopolis?
19 of the 57 figures for Thermopolis on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Thermopolis are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Thermopolis.