Counties in Wyoming Laramie County (Cheyenne) Natrona County (Casper) Campbell County (Gillette) Sweetwater County (Green River) Fremont County (Lander) Albany County (Laramie) Sheridan County (Sheridan) Park County (Cody) Teton County (Jackson) Uinta County (Evanston) Lincoln County (Kemmerer) Carbon County (Rawlins) Converse County (Douglas) Goshen County (Torrington) Big Horn County (Basin) Sublette County (Pinedale) Platte County (Wheatland) Johnson County (Buffalo) Washakie County (Worland) Crook County (Sundance) Weston County (Newcastle) Hot Springs County (Thermopolis) Niobrara County (Lusk)