Wyo. Stat. § 37-13-110
The notice shall be published in full one (1) time in a newspaper of general circulation in the county, city, or town in which the proposed district is located and by posting in not less than three (3) public places in the district. A copy of the notice shall be mailed to each owner of land within the proposed district whose property will be assessed for the cost of the improvement, at the address last appearing on the real property assessment rolls of the county wherein the property is located. In addition, a copy of the notice shall be addressed to "owner" and mailed to the street number of each piece of property to be affected by the assessment. Mailed notices and the published notice shall state where a copy of the resolution creating the district is available for inspection.
W.S. 37-13-110