Wisconsin advises engaged couples to apply for a marriage license at least 7 days before the day they are to be married. In the state of Wisconsin, there is a 5 day waiting period for a marriage license. This does not include the day that you go in and apply for your marriage license. If you include the day you apply for a marriage license, the total waiting period is 6 days. Bottom line: Get your marriage license early but not too early, as your marriage license is only valid for 30 days!