New Orleans  does not have Justices of the Peace as they were no longer needed when the city courts system was created. Justices of the Peace evolved from history in England and was instituted in America, George Washington was a Justice of the Peace in Virginia. Louisiana does have active Justice of the Peace courts mostly in rural Parishes.  Historically the JP was used to conduct civil weddings for people who did not want to be married in a church. Generally the marriage ceremony is short just to comply with the law and some couples later on get the marriage blessed by the church. A JP can perform longer ceremonies if they like but most prefer just to do a short civil ceremony. Jerry Schwehm served as Justice of the Peace for several years north of New Orleans and performed many civil ceremonies over the last  20 years. He does weddings in New Orleans both short civil or religious. He can be contacted at his home page: http://www.figstreet.com/weddingswlope He will meet you at your location or you can meet him at his office in Pearl River, La. to get married. You need a Louisiana marriage license.