Gretna, city (1990 pop. 17,208), seat of Jefferson parish, SE La., on the Mississippi River. A suburb of New Orleans, it produces marble, granite, chemicals, and food products. Founded in the early 19th cent. as Mechanicsham, Gretna merged with McDonoghville in 1913.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.