County	Founded	Parent	County Seat
ALBANY	1868	Original County	Laramie
BIG HORN	1890	Fremont, Johnson	Basin
CAMPBELL	1911	Crook, Weston	Gillette
CARBON	1868	Original County	Rawlins
CONVERSE	1888	Laramie, Albany	Douglas
CROOK	1885	Pease	Sundance
FREMONT	1884	Sweetwater	Lander
GOSHEN	1911	Platte, Laramie	Torrington
HOT SPRINGS	1911	Fremont	Thermopolis
JOHNSON	1875	Pease	Buffalo
LARAMIE	1867	Original County	Cheyenne
LINCOLN	1913	Uinta	Kemmerer
NATRONA	1888	Carbon	Casper
NIOBRARA	1911	Converse	Lusk
PARK	1909	Big Horn	Cody
PLATTE	1913	Laramie	Wheatland
SHERIDAN	1888	Johnson	Sheridan
SUBLETTE	1921	Fremont	Pinedale
SWEETWATER	1867	Originally Carter County	Green River
TETON	1921	Lincoln	Jackson
UINTA	1869	Original County	Evanston
WASHAKIE	1911	Big Horn, Johnson	Worland
WESTON	1890	Crook	Newcastle
WIND RIVER INDIAN RESERVATION	Orig. est. 1851	Sweetwater, Fremont	Ft. Washakie