If you want to have a great wedding in Las Vegas make sure you do your homework! Unless you're a spontaneous-spur of the moment person, then by all means you can just show up. However, we'd advise you to plan far ahead of your wedding date. To get married in Vegas, you will need a marriage license from the Marriage Bureau, Las Vegas, Nevada. It is located at 200 S. 3rd Street, 1st floor Las Vegas, NV 89155-1603.