Wyo. Const. art. 15, § 12: Exemptions from taxation.

The property of the United States, the state, counties, cities, towns, school districts and municipal corporations, when used primarily for a governmental purpose, and public libraries, lots with the buildings thereon used exclusively for religious worship, church parsonages, church schools and public cemeteries, shall be exempt from taxation, and such other property as the legislature may by general law provide.