Gretna is the second-largest city in, and parish seat of, Jefferson Parish in the U.S. state of Louisiana. Gretna lies on the west bank of the Mississippi River, just east and across the river from uptown New Orleans. It is part of the New Orleans–Metairie–Kenner metropolitan statistical area.
Gretna has a population of over 17,814 people. Gretna also forms part of the wider New Orleans-Metairie-Kenner metropolitan area which has a population of over 1,452,502 people.