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County · code 56041

Uinta CountyWyoming

Uinta County is a county in Wyoming with its county seat in Evanston. It was formed on December 1, 1869, from Carter and Sweetwater Counties and named after the Uinta Mountains.

  • Founded1869
  • County seatEvanston
  • Named forUinta Mountains
  • Land area2,082 sq mi + 6.4 sq mi water
  • Population20,450 2020 Census
  • Parcels mapped14,852 checked 15 October 2026
Open the free map Click any parcel in Uinta County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

Summit, UTRich, UTLincolnSweetwater Evanston Census outline · seat marked

Where it is

Uinta on the map of Wyoming

Wyoming has 23 counties and county equivalents, each with its own records office. Shapes with a page are links.

Albany CountyBig Horn CountyCampbell CountyCarbon CountyConverse CountyCrook CountyFremont CountyGoshen CountyHot Springs CountyJohnson CountyLaramie CountyLincoln CountyNatrona CountyNiobrara CountyPark CountyPlatte CountySheridan CountySublette CountySweetwater CountyTeton CountyWashakie CountyWeston CountyUinta County Uinta
Counties of Wyoming · Uinta highlighted

History

Formed in 1869 from Carter County and Sweetwater County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Uinta County was created by Wyoming Territory on December 1, 1869, from Carter (now Sweetwater) and non-county area. The Wyoming portion of Yellowstone National Park, established in 1872, lay within Uinta County, a fact confirmed by the Wyoming Territorial Legislature in 1884. Uinta became a county in the state of Wyoming on July 10, 1890, and in 1911 lost territory to the creation of Lincoln County while gaining some territory from Sweetwater County when boundaries were adjusted to federal land survey lines.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1869
    Uinta County created Uinta created by Wyoming Territory from Carter (now Sweetwater) and non-county area.
    from Carterfrom Sweetwater
    · Wyo. Terr. Laws 1869, 1st leg., ch. 34/p. 382; Whitehead, 194
  2. 1872
    Uinta County created The United States created America's first national park--Yellowstone. The Park lay mostly in Wyoming Territory, with smaller sections in Montana and Idaho Territories. The Wyoming section of the Park lay in Uinta. · U.S. Stat., vol. 17, ch 24[1872]/pp. 32-33
  3. 1884
    Uinta County created The Wyoming Territorial Legislature confirmed that the Wyoming portion of Yellowstone National Park, established 1 March 1872, was part of Uinta. · Wyo. Terr. Laws 1884, 8th leg., ch. 103/pp. 177-183
  4. 1890
    Became part of Wyoming Uinta became a county in the state of Wyoming. · Wyoming Constitution 1889, art. 12 in Swindler, 10:493; U.S. Stat., vol. 26, ch. 664[1890]/pp. 222-226; Van Zandt, 145
  5. 1911
    Lost territory Uinta lost to creation of Lincoln. Lincoln not fully organized, attached to Uinta "for judicial, revenue and election purposes." Uinta gained from Sweetwater when boundary was adjusted to run on federal land survey lines. Technically, Lincoln had been created on 20 February 1911, but the several boundary laws of February 1911 were not passed in the intended sequence and mapping them in strict chronological order is not practical. By treating the law of 21 February as the basic structure that the other laws modify, the mapping reflects the intent of the legislature.
    to Lincolnto Sweetwater
    · Wyo. Laws 1911, 11th leg., ch. 67/pp. 93-94 and ch. 77, secs. 12-13/pp. 111-113
Show all 8 changes (3 more, mostly small adjustments)
  1. 1869
    Uinta County created Uinta created by Wyoming Territory from Carter (now Sweetwater) and non-county area.
    from Carterfrom Sweetwater
    · Wyo. Terr. Laws 1869, 1st leg., ch. 34/p. 382; Whitehead, 194
  2. 1872
    Uinta County created The United States created America's first national park--Yellowstone. The Park lay mostly in Wyoming Territory, with smaller sections in Montana and Idaho Territories. The Wyoming section of the Park lay in Uinta. · U.S. Stat., vol. 17, ch 24[1872]/pp. 32-33
  3. 1884
    Uinta County created The Wyoming Territorial Legislature confirmed that the Wyoming portion of Yellowstone National Park, established 1 March 1872, was part of Uinta. · Wyo. Terr. Laws 1884, 8th leg., ch. 103/pp. 177-183
  4. 1890
    Became part of Wyoming Uinta became a county in the state of Wyoming. · Wyoming Constitution 1889, art. 12 in Swindler, 10:493; U.S. Stat., vol. 26, ch. 664[1890]/pp. 222-226; Van Zandt, 145
  5. 1911
    Lost territory Uinta lost to creation of Lincoln. Lincoln not fully organized, attached to Uinta "for judicial, revenue and election purposes." Uinta gained from Sweetwater when boundary was adjusted to run on federal land survey lines. Technically, Lincoln had been created on 20 February 1911, but the several boundary laws of February 1911 were not passed in the intended sequence and mapping them in strict chronological order is not practical. By treating the law of 21 February as the basic structure that the other laws modify, the mapping reflects the intent of the legislature.
    to Lincolnto Sweetwater
    · Wyo. Laws 1911, 11th leg., ch. 67/pp. 93-94 and ch. 77, secs. 12-13/pp. 111-113
  6. 1913
    Changed Lincoln fully organized, detached from Uinta.
    Lincoln
    · Trenholm, 2:518
  7. 1950
    Boundary clarified Uinta boundaries redefined (no change).
    no change
    · Wyo. Laws 1950, 30th leg., spec. sess., ch. 8/p. 16
  8. 1951
    Boundary clarified Uinta boundaries clarified to reflect a resurvey of townships along the southeastern corner of Uinta (no change).
    no change
    · Wyo. Laws 1951, 31st leg., ch. 61, sec. 2/pp. 82-83

Land and parcels

What the maps cover in Uinta

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Uinta by the Census

Population
20,450 2020 Census count
Housing units
8,798 2020 Census count
Land area
2,082 square miles
Water area
6.4 square miles
People per sq mi
10 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Zoning and code

County government

See your own lot on these maps

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Questions

Common questions about Uinta County

When was Uinta County founded?
Uinta County was founded in 1869, formed from Carter County and Sweetwater County, and named after Uinta Mountains.
What is the county seat of Uinta County?
The county seat of Uinta County is Evanston.
Is there an online parcel map for Uinta County?
Yes. Wyoming Department of Revenue, Property Tax Division (statewide parcels from county assessors) publishes a parcel map of 14,852 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Uinta County's boundary or name changed?
Uinta County was created in 1869 from Carter County and Sweetwater County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Lincoln County and Sweetwater County.
Is my lot in a flood zone?
We do not have flood maps for Uinta County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door