Wyoming is located in the western part of the United States and looks like a square in shape. The land area is 250,000 square kilometers and the population is 510,000. The state's capital is Cheyenne, the area code is 307, and the abbreviated zip code is WY. Wyoming is relatively high and has plains. The economy is dominated by the mining industry, with coal resources, natural gas and so on. The more important cities are Cheyenne, Casper, Laramie, Rock Springs, Gillette, Sheridan, Green River, Evanston ( Evanston) et al. The ZIP codes of the more important cities in Wyoming are as follows: 82609; Laramie zip codes are 82070, 82071, 82072, 82073.