If a new county is organized after the fourth Monday in May and before the following first Monday in January the taxes levied and collected from property within the new county for that year shall be paid by the county treasurer of the original county to the county treasurer of the new county.
Wyo. Stat. Ann. § 18-1-314
Taxes for new counties
Official source: Wyoming Legislature. Reproduced from public-domain Wyoming statutes; confirm against the official source for the current text. Not legal advice.