Martin Behrman (October 14, 1864 – January 12, 1926), an American Democratic politician, was the longest-serving mayor in New Orleans history.

He lived most of his life in the Algiers neighborhood, on the west bank of the Mississippi River.

As a young man he became affiliated with the Regular Democratic Organization, a powerful political faction in New Orleans, during the 1888 campaign of Francis T. Nicholls for governor of Louisiana.

[3] Behrman served as a delegate to the Louisiana state constitutional convention in 1898.

Behrman ran again in 1925 and won, serving from 1925; he died in New Orleans on January 12, 1926, less than a year into his fifth term.