The requirements to obtain a marriage license in the United States are controlled by each State through the local county or city municipalities. 

If you are planning a Church wedding, you must still obtain a valid marriage license before the wedding date. 

Some general information about the U.S. marriage laws can be found at: http://usmarriagelaws.com/search/united_states/index.shtml, however State and county marriage license requirements often change. It is important that you verify all information with your local marriage license office or county clerk before making any wedding or travel plans.