Wyo. Stat. § 1-16-102: Interest on judgments.

(a) Except as provided in subsections (b) and (c) of this section, all decrees and judgments for the payment of money shall bear interest at ten percent (10%) per year from the date of rendition until paid.

(b) If the decree or judgment is founded on a contract and all parties to the contract agreed to interest at a certain rate, the rate of interest on the decree or judgment shall correspond to the terms of the contract.

(c) A periodic payment or installment for child support or maintenance which is unpaid on the date due and which on or after July 1, 1990, becomes a judgment by operation of law pursuant to W.S. 14-2-204 shall not bear interest.