Census-designated place · Wyoming
Boulder Flats, Wyoming
Boulder Flats, census-designated place, in Fremont County, Wyoming. Boulder Flats had 450 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 564 (±128). GEOID 5609307.
Residents, 2020 Census
450
Census count or controlled total
ACS 2020-2024 estimate: 564 ±128
Median household income
$83,929
±$11,595 (90% margin)
Wyoming: $76,176
Median home value
$258,300
±$127,349 (90% margin)
Wyoming: $309,700
Median gross rent
$1,069
±$309 (90% margin)
Wyoming: $992
Where is Boulder Flats and what county is it in?
Boulder Flats is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Fremont County, Wyoming. It covers 18.2 square miles of land, 25 residents per square mile in 2020.
Boulder Flats is in the Riverton, WY micropolitan statistical area (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Boulder Flats, and is it growing?
The 2020 Census counted 450 residents in Boulder Flats, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 564 (±128).
The Census Bureau publishes yearly population estimates for incorporated places only; Boulder Flats is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Boulder Flats | Fremont County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 564 ±128 | 39,533 | +314 |
| Households | 168 ±40 | 15,037 | +74 |
| Average household size | 3.36 ±0.73 | 2.56 | no clear change |
| Housing units | 188 ±40 | 17,469 | +73 |
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 Boulder Flats?
The median resident of Boulder Flats is 33.7 years old; 30.0% are under 18 and 19.9% are 65 or older. The largest group is non-Hispanic American Indian and Alaska Native residents at 62.8%, then non-Hispanic white residents at 26.8%.
| Measure | Boulder Flats | Fremont County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 33.7 ±5.7 | 39.7 | −9.5 |
| Under 18 years | 30.0% ±6.9 pts | 24.5% | – |
| 65 years and over | 19.9% ±7.5 pts | 20.0% | – |
| Male | 52.5% ±6.4 pts | 50.6% | – |
| Hispanic or Latino (any race) | 3.0% ±3.1 pts | 6.9% | – |
| White alone, not Hispanic | 26.8% ±9.4 pts | 68.7% | no clear change |
| Black or African American alone, not Hispanic | 1.4% ±1.6 pts | 0.5% | – |
| Asian alone, not Hispanic | 0.0% ±6.4 pts | 0.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 62.8% ±11.7 pts | 17.5% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±6.4 pts | 0.1% | – |
| Two or more races, not Hispanic | 6.0% ±5.1 pts | 5.1% | – |
| Some other race alone, not Hispanic | 0.0% ±6.4 pts | 0.8% | – |
| Born outside the United States | 0.0% ±6.4 pts | 1.7% | – |
| Speak a language other than English at home (age 5+) | 17.1% ±10.3 pts | 5.7% | – |
| Civilian veterans (age 18+) | 7.8% ±3.9 pts | 8.3% | – |
| With a disability | 12.9% ±6.0 pts | 15.4% | – |
| No health insurance coverage | 36.0% ±7.9 pts | 17.5% | no clear change |
| High school graduate or higher (age 25+) | 90.8% ±6.1 pts | 93.7% | – |
| Bachelor's degree or higher (age 25+) | 28.0% ±9.6 pts | 26.5% | no clear change |
| Graduate or professional degree (age 25+) | 8.4% ±4.5 pts | 10.4% | – |
| Lived in the same house a year earlier | 96.8% ±3.1 pts | 87.0% | – |
| Moved from another state in the past year | 0.0% ±6.5 pts | 4.1% | – |
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 Boulder Flats earn?
Half of Boulder Flats's 168 households earn less than $83,929 a year (±$11,595), against $64,904 in Fremont County and $76,176 in Wyoming. In 2015-2019 it was $70,765 in 2024 dollars; the margins of error cannot tell the two periods apart. 20.9% of residents live below the poverty line.
| Measure | Boulder Flats | Fremont County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $83,929 ±$11,595 | $64,904 | no clear change |
| Mean household income | $91,090 ±$18,474 | $81,945 | – |
| Per capita income | $31,313 ±$7,359 | $32,793 | no clear change |
| People below the poverty line | 20.9% ±12.4 pts | 12.8% | – |
| Children under 18 below the poverty line | 24.8% ±22.2 pts | 16.7% | – |
| Households receiving SNAP | 17.9% ±8.2 pts | 8.1% | – |
| Households with a computer | 100.0% ±19.9 pts | 94.1% | – |
| Households with a broadband subscription | 96.4% ±3.7 pts | 88.8% | – |
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 Boulder Flats?
Owners occupy 84.5% of Boulder Flats's occupied homes and renters 15.5%. The median owner-occupied home is valued at $258,300 by its owner (±$127,349). The median renter pays $1,069 a month including utilities.
| Measure | Boulder Flats | Fremont County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $258,300 ±$127,349 | $268,800 | no clear change |
| Median gross rent | $1,069 ±$309 | $898 | no clear change |
| Renters paying 35% or more of income on rent | 0.0% ±88.4 pts | 28.8% | – |
| Median monthly owner costs, with a mortgage | $1,438 ±$729 | $1,629 | – |
| Owner-occupied homes | 84.5% ±7.6 pts | 70.1% | no clear change |
| Renter-occupied homes | 15.5% ±7.6 pts | 29.9% | – |
| Housing units | 188 ±40 | 17,469 | +73 |
| Homeowner vacancy rate | 0.0% ±22.9 pts | 0.8% | – |
| Rental vacancy rate | 0.0% ±62.5 pts | 3.8% | – |
| Single-family detached homes | 83.0% ±8.2 pts | 70.5% | – |
| Mobile homes | 15.4% ±7.8 pts | 17.2% | – |
| Built 2020 or later | 0.0% ±18.0 pts | 0.5% | – |
| Built 2010 to 2019 | 8.5% ±7.9 pts | 5.8% | – |
| Built 1939 or earlier | 5.9% ±4.7 pts | 9.1% | – |
| Households with no vehicle | 1.2% ±2.1 pts | 4.4% | – |
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 do people in Boulder Flats work and get to work?
67.2% of Boulder Flats's workers drive alone and 21.4% work from home. The average trip to work takes 15.7 minutes. The unemployment rate in 2020-2024 averaged 16.5%.
| Measure | Boulder Flats | Fremont County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 55.2% ±7.8 pts | 61.2% | – |
| Unemployment rate | 16.5% ±7.0 pts | 7.4% | – |
| Drove alone to work | 67.2% ±11.4 pts | 73.9% | – |
| Carpooled | 9.4% ±8.0 pts | 9.6% | – |
| Public transportation | 0.0% ±17.7 pts | 0.8% | – |
| Walked | 0.0% ±17.7 pts | 4.0% | – |
| Worked from home | 21.4% ±11.6 pts | 9.7% | – |
| Mean travel time to work | 15.7 min ±1.9 | 17.2 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 Boulder Flats?
No census tract lies mostly in Boulder Flats; 2 tracts reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9402.02Fremont County | 4,898 | $68,714 |
| Tract 9401Fremont County | 3,221 | $63,380 |
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 Boulder Flats) · Census block assignment files
How does Boulder Flats compare with other places in Wyoming?
Boulder Flats is not ranked by income or the other survey measures: those rankings include places of 1,000 or more residents (2020 Census) with a reliable estimate.
Boulder Flats's figures with every place in Wyoming (CSV)
Every place in Wyoming, sortable · Compare Boulder Flats 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 Boulder Flats?
19 of the 57 figures for Boulder Flats 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 Boulder Flats 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' school search.