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County · code 56007

Carbon CountyWyoming

Carbon County is located in Wyoming and has its county seat in Rawlins. The county was established on December 16, 1868, from Laramie County and named after coal and carbon.

  • Founded1868
  • County seatRawlins
  • Named forcoal and carbon
  • Land area7,898 sq mi + 66 sq mi water
  • Population14,537 2020 Census
  • Parcels mapped12,507 checked 15 October 2026
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Updated

Jackson, COAlbanyRoutt, CONatronaMoffat, COConverseSweetwaterFremont Rawlins Census outline · seat marked

Where it is

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

History

Formed in 1868 from Laramie County

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

Carbon County was created by Dakota Territory from Laramie County on December 16, 1868, with a southern boundary error that was corrected on January 1, 1870. When Wyoming Territory was fully organized on May 19, 1869, Carbon became a Wyoming Territory county, and when Wyoming achieved statehood on July 10, 1890, it became a state county. The county underwent multiple boundary adjustments between 1875 and 1911, losing territory to the creation of Johnson and Natrona counties and gaining land from Sweetwater, Albany, and Fremont counties.

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

  1. 1868
    Carbon County created Carbon created by Dakota Territory from Laramie. Error in the definition of Carbon's southern boundary was corrected 1 January 1870 by the Wyoming Territorial Legislature.
    from Laramie
    · Dak. Terr. Laws 1868, 8th sess., ch. 35/p. 321; Trenholm, 1:84, 334
  2. 1869
    Became part of Wyoming Wyoming Territory fully organized; Carbon became a Wyoming Territory county. · Trenholm, 1:83-84, 334
  3. 1870
    Gained territory Carbon gained a half-mile-wide strip of territory from Albany all along Carbon's eastern boundary. Mistake in description dating from 16 December 1868 was corrected.
    from Albany
    · Wyo. Terr. Laws 1869, 1st leg., ch. 37/pp. 387-388; Whitehead, 197
  4. 1875
    Lost territory Carbon lost to creation of Pease (now Johnson). Pease not fully organized, part attached to Carbon "for judicial and all other purposes."
    to Peaseto Johnson
    · Whitehead, 199-201
  5. 1890
    Became part of Wyoming Carbon 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
Show all 12 changes (7 more)
  1. 1868
    Carbon County created Carbon created by Dakota Territory from Laramie. Error in the definition of Carbon's southern boundary was corrected 1 January 1870 by the Wyoming Territorial Legislature.
    from Laramie
    · Dak. Terr. Laws 1868, 8th sess., ch. 35/p. 321; Trenholm, 1:84, 334
  2. 1869
    Became part of Wyoming Wyoming Territory fully organized; Carbon became a Wyoming Territory county. · Trenholm, 1:83-84, 334
  3. 1870
    Gained territory Carbon gained a half-mile-wide strip of territory from Albany all along Carbon's eastern boundary. Mistake in description dating from 16 December 1868 was corrected.
    from Albany
    · Wyo. Terr. Laws 1869, 1st leg., ch. 37/pp. 387-388; Whitehead, 197
  4. 1875
    Lost territory Carbon lost to creation of Pease (now Johnson). Pease not fully organized, part attached to Carbon "for judicial and all other purposes."
    to Peaseto Johnson
    · Whitehead, 199-201
  5. 1877
    Boundary clarified Carbon boundaries clarified; explicitly corrected error of 16 December 1868 (no change).
    no change
    · Wyo. Terr. Laws 1877, 5th leg., p. 19
  6. 1881
    Changed Johnson fully organized, detached from Carbon.
    Johnson
    · Trenholm, 1:331
  7. 1886
    Gained territory Carbon gained from Sweetwater, lost to Albany.
    from Sweetwaterfrom Albany
    · Wyo. Terr. Laws 1886, 9th leg., ch. 5/pp. 5-8
  8. 1888
    Lost territory Carbon lost to creation of Natrona. Natrona not fully organized, attached to Carbon for administrative and judicial purposes.
    to Natrona
    · Wyo. Terr. Laws 1888, 10th leg., ch. 90, sec. 61/pp. 217-218
  9. 1890
    Changed Natrona fully organized, detached from Carbon.
    Natrona
    · Trenholm, 1:331
  10. 1890
    Became part of Wyoming Carbon 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
  11. 1909
    Gained territory Carbon gained small area from Fremont and exchanged with Sweetwater when boundaries were adjusted to run on federal land survey lines.
    from Fremontfrom Sweetwater
    · Wyo. Laws 1909, 10th leg., ch. 129, sec. 1/pp. 174-175
  12. 1911
    Gained territory Carbon gained from Sweetwater, boundary with Albany was adjusted to run on federal land survey lines.
    from Sweetwaterfrom Albany
    · Wyo. Laws 1911, 11th leg., ch. 77, secs. 1, 3, 12/pp. 102-105, 111-112

Land and parcels

What the maps cover in Carbon

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

Carbon by the Census

Population
14,537 2020 Census count
Housing units
8,157 2020 Census count
Land area
7,898 square miles
Water area
66 square miles
People per sq mi
2 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

Carbon County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

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Questions

Common questions about Carbon County

When was Carbon County founded?
Carbon County was founded in 1868, formed from Laramie County, and named after coal and carbon.
What is the county seat of Carbon County?
The county seat of Carbon County is Rawlins.
Is there an online parcel map for Carbon County?
Yes. A public source publishes a parcel map of 12,507 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Carbon County's boundary or name changed?
Carbon County was created in 1868 from Laramie County. Since then the Atlas of Historical County Boundaries records 10 later changes, chiefly involving Albany County, Sweetwater County and Johnson County.
Is my lot in a flood zone?
We do not have flood maps for Carbon 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