Marriage licenses aren’t like fishing licenses, or driver’s licenses, which expire every few years and must be renewed. Although most counties would welcome the extra income if folks had to come in every few years to renew their marriage license, the situation could lead to a lot of chaos if people found out they weren’t married anymore. It might alson help to keep some marriages together if people renewed their vows on occasion; however, that’s not how the system works. No, marriages are meant to last forever, so the license that makes them official is valid forever and never expires.
Yes, it may expire within 30 to 90 days. Each state sets its own laws on weddings and marriage licenses. You'll have to apply for a marriage license in the state where you plan to have the wedding, and in some places, you'll have to get your marriage license in the same county where you get married.