County · Wyoming

Sweetwater County, Wyoming

Sweetwater County, Wyoming. Sweetwater County had 41,267 residents in 2025 by the Census Bureau's estimate, down 2.4% since 2020, while Wyoming grew 2.1%. It holds 19 places (6 cities, villages and boroughs and 13 census-designated) and 13 census tracts. GEOID 56037.

Sweetwater County is the county of the Rock Springs, WY micropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

41,267

Census Bureau estimate (no margin published)
2020 Census count: 42,272 · ACS 2020-2024: 41,542

Median household income

$75,034

±$3,808 (90% margin)
Wyoming: $76,176

Median home value

$251,400

±$9,650 (90% margin)
Wyoming: $309,700

Median gross rent

$911

±$35 (90% margin)
Wyoming: $992

How many people live in Sweetwater County, and is it growing?

The 2020 Census counted 42,272 residents in Sweetwater County. The Census Bureau estimates 41,267 for July 1, 2025, down 2.4% since 2020, while Wyoming grew 2.1%. The 2020-2024 American Community Survey puts the population at 41,542 over 10,427 square miles of land.

July 2020→2021 −558 (41,636)
2021→2022 −317 (41,319)
2022→2023 −25 (41,294)
2023→2024 +56 (41,350)
2024→2025 −83 (41,267)

Sweetwater County in Wyoming. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Sweetwater County	Wyoming	Change since 2015-2019
Total population	41,542	582,397	−1,979
Households	17,502±351	243,318	+1,979
Average household size	2.34±0.05	2.34	−0.43
Housing units	19,289±56	277,141	−482

Sweetwater County's population since 2000

From 37,613 in 2000 to 41,267 in 2025: up 9.7%. The 2000, 2010 and 2020 figures are census counts. 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.

2000 Census 37,613
2005 (estimate) 38,739
2010 Census 43,806
2015 (estimate) 44,780
2020 Census 42,272
2025 (estimate) 41,267

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); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in Sweetwater County?

Sweetwater County holds 19 places: 6 cities, villages and boroughs (incorporated places) and 13 census-designated places. The largest is Rock Springs with 22,936 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in Sweetwater County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Rock Springs	city	23,526	23,127±26	$69,168	$256,200	16.1%	100%
Green River	city	11,825	11,581±34	$84,747	$263,400	9.3%	100%
North Rock Springs	CDP	2,439	2,277±308	$104,350	$313,000	9.0%	100%
Clearview AcresGEOID 5615400	CDP	758	273±178	$62,054	not published	7.0%	100%
RelianceGEOID 5665060	CDP	622	572±250	not published	$28,700	0.0%	100%
James TownGEOID 5640265	CDP	455	431±266	$118,750	not published	0.0%	100%
Purple SageGEOID 5662812	CDP	319	489±284	$55,432	not published	20.2%	100%
FarsonGEOID 5626055	CDP	272	68±66	not published	not published	0.0%	100%
EdenGEOID 5623010	CDP	235	472±238	$89,625	$146,900	2.1%	100%
WamsutterGEOID 5681300	town	203	269±114	$57,298	$98,700	16.0%	100%
SuperiorGEOID 5674775	town	184	177±119	$96,250	not published	4.0%	100%
GrangerGEOID 5632870	town	98	257±137	$78,889	$100,000	5.1%	100%
BairoilGEOID 5604885	town	68	149±88	$40,250	$23,700	36.2%	100%
Arrowhead SpringsGEOID 5603652	CDP	59	43±38	not published	$430,600	0.0%	100%
Point of RocksGEOID 5662160	CDP	53	9±12	not published	not published	0.0%	100%
Little AmericaGEOID 5646935	CDP	47	19±30	not published	not published	63.2%	100%
WashamGEOID 5681703	CDP	39	187±233	not published	not published	4.8%	100%
McKinnonGEOID 5649400	CDP	20	0±13	not published	not published	–	100%
Table RockGEOID 5675355	CDP	0	0±13	not published	not published	–	100%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in Sweetwater County?

The median resident of Sweetwater County is 37.9 years old; 25.0% are under 18 and 14.8% are 65 or older. The largest group is non-Hispanic white residents at 76.8%, then Hispanic or Latino residents (of any race) at 16.8%. 5.3% of residents were born outside the United States.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Sweetwater County	Wyoming	Change since 2015-2019
Median age	37.9±0.6	39.1	+2.6
Under 18 years	25.0%±0.2 pts	22.5%	–
65 years and over	14.8%±0.1 pts	18.5%	–
Hispanic or Latino (any race)	16.8%	10.7%	+0.9 pts
White alone, not Hispanic	76.8%±0.8 pts	81.4%	−2.8 pts
Black or African American alone, not Hispanic	1.3%±0.2 pts	0.8%	no clear change
Asian alone, not Hispanic	0.5%±0.2 pts	0.8%	no clear change
American Indian and Alaska Native alone, not Hispanic	0.5%±0.3 pts	1.6%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±0.1 pts	0.1%	–
Two or more races, not Hispanic	3.3%±0.8 pts	4.0%	–
Some other race alone, not Hispanic	0.8%±0.6 pts	0.7%	–
Born outside the United States	5.3%±0.9 pts	3.5%	no clear change
Speak a language other than English at home (age 5+)	8.8%±1.1 pts	6.8%	–
Civilian veterans (age 18+)	8.8%±1.2 pts	9.0%	–
With a disability	15.6%±1.6 pts	14.1%	–
No health insurance coverage	12.8%±1.5 pts	11.3%	no clear change
High school graduate or higher (age 25+)	92.8%±1.2 pts	94.2%	–
Bachelor's degree or higher (age 25+)	20.9%±2.0 pts	30.6%	no clear change
Graduate or professional degree (age 25+)	6.2%±1.1 pts	11.5%	–
Moved from another state in the past year	3.7%±1.6 pts	4.7%	–

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 Sweetwater County earn?

Half of Sweetwater County's 17,502 households earn less than $75,034 a year (±$3,808), against $76,176 in Wyoming. In 2015-2019 the median was $92,109 in 2024 dollars, so it fell by $17,075 after inflation. 12.9% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Sweetwater County	Wyoming	Change since 2015-2019
Median household income	$75,034±$3,808	$76,176	−$17,075
Mean household income	$97,925±$6,974	$100,641	–
Per capita income	$41,511±$2,907	$42,668	no clear change
People below the poverty line	12.9%±2.3 pts	10.5%	no clear change
Children under 18 below the poverty line	16.0%±4.9 pts	11.7%	no clear change
Households receiving SNAP	7.4%±1.7 pts	5.2%	–
Households with a broadband subscription	88.8%±2.1 pts	89.4%	–

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 Sweetwater County?

Owners occupy 74.6% of Sweetwater County's occupied homes and renters 25.4%. The median owner-occupied home is valued at $251,400 by its owner (±$9,650). The median renter pays $911 a month including utilities, and 35.1% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Sweetwater County	Wyoming	Change since 2015-2019
Median home value (owner-occupied)	$251,400±$9,650	$309,700	no clear change
Median gross rent	$911±$35	$992	−$149
Renters paying 35% or more of income on rent	35.1%±6.4 pts	33.8%	no clear change
Median monthly owner costs, with a mortgage	$1,648±$76	$1,754	–
Owner-occupied homes	74.6%±2.5 pts	71.8%	no clear change
Housing units	19,289±56	277,141	−482
Homeowner vacancy rate	0.4%±0.4 pts	0.9%	–
Rental vacancy rate	10.1%±4.1 pts	6.0%	–
Single-family detached homes	62.3%±2.2 pts	67.8%	–
Mobile homes	18.1%±1.9 pts	11.5%	–
Built 2020 or later	0.5%±0.4 pts	1.5%	–
Built 1939 or earlier	9.5%±1.8 pts	10.8%	–

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 Sweetwater County building?

Builders took permits for 35 new housing units across Sweetwater County in 2025 (35 single-family), 0.8 per 1,000 residents.

2019 68 units
2020 50 units
2021 49 units
2022 33 units
2023 45 units
2024 45 units
2025 35 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in Sweetwater County get to work?

76.7% of Sweetwater County's workers drive alone and 4.4% work from home. The average trip to work takes 23.8 minutes. The unemployment rate in 2020-2024 averaged 5.6%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Sweetwater County	Wyoming	Change since 2015-2019
In the labor force (age 16+)	66.7%±1.7 pts	65.1%	–
Unemployment rate	5.6%±1.3 pts	3.7%	no clear change
Drove alone to work	76.7%±2.3 pts	74.8%	–
Carpooled	12.9%±1.7 pts	9.4%	–
Public transportation	2.5%±1.0 pts	0.9%	–
Walked	2.4%±0.7 pts	3.6%	–
Worked from home	4.4%±0.9 pts	9.4%	+2.2 pts
Mean travel time to work	23.8 min±1.8	18.8 min	+4.2 min

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 are Sweetwater County's census tracts?

Sweetwater County is divided into 13 census tracts. Among those with a reliable estimate, median household income runs from $39,265 (Tract 9708) to $113,493 (Tract 9706.02).

Census tracts of Sweetwater County, ACS 2020-2024 5-year estimates; sort by any column

Tract 970556037970500	Green River (17%)	2,354	2,945±431	$73,183	$146,600	$1,259	10.8%
Tract 9706.0156037970601	Green River (63%)	3,862	3,919±506	$77,213	$218,900	$860	8.6%
Tract 9706.0256037970602	Green River	3,247	3,063±356	$113,493	$286,800	$973	11.4%
Tract 970756037970700	Green River (23%)	3,816	3,385±521	$91,985	$298,100	$920	7.9%
Tract 970856037970800	Rock Springs (69%)	5,202	4,311±509	$39,265	$146,600	$841	23.0%
Tract 9709.0256037970902	Rock Springs	5,060	4,935±506	$79,138	$302,200	$1,091	11.5%
Tract 9709.0356037970903	Rock Springs (86%)	2,582	2,696±363	$65,917	$274,100	$832	14.8%
Tract 9709.0456037970904	North Rock Springs (73%)	2,469	2,277±308	$104,350	$313,000	not published	9.0%
Tract 9709.0556037970905	Rock Springs (72%)	5,308	5,260±718	$111,659	$355,400	$1,163	6.6%
Tract 971056037971000	Rock Springs (82%)	1,757	1,564±345	$52,368	$167,800	$843	21.8%
Tract 971156037971100	Rock Springs (96%)	2,772	3,122±627	$81,364	$226,100	$895	22.6%
Tract 971256037971200	Rock Springs (95%)	2,421	2,321±352	$68,629	$232,800	$700	16.6%
Tract 971656037971600	Farson (3%)	1,422	1,744±305	$74,250	$126,300	$1,005	7.6%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does Sweetwater County compare with Wyoming's other counties?

Sweetwater County's rank among Wyoming's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	4th of 23
Growth 2020-2025	21st of 23
Residents per square mile	13th of 23
Median household income	10th of 23
Median home value	16th of 23
Median gross rent	11th of 23
Poverty rate	4th of 23
Bachelor's degree or higher	20th of 23
Median age	20th of 23

Every county in Wyoming

Source: PlainCities ranks 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 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 Sweetwater County 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.