Abdiel Daily Crossman (1804 – June 13, 1859) was Mayor of New Orleans from April 6, 1846 to March 26, 1854, having served four consecutive terms.

His business succeeded almost immediately, however, and it was not long before he was one of New Orleans' more respected merchants, becoming a director in several banks and an officer of some of the more prominent benevolent societies.

Crossman set to work to reduce expenses and increase revenues, with such success that he was soon able to put the credit of the municipality upon a secure basis.

His fourth and final term was the hardest fought, with 4,993 votes going to Crossman and 4,877 to his opponent Lewis, the candidate of a new reform party.

[1] On August 21, 1851, a serious riot broke out in New Orleans when it became known that a revolution led by General Narciso López had failed to take control of Cuba, and had been executed by the Spanish government: López having obtained much of his financial backing in New Orleans, a mob wrecked a number of Spanish-owned stores in the city and attacked the Spanish consulate.

[1] Crossman also worked to promote railroad links between New Orleans and the rest of the country, and to have the U. S. government establish a naval depot in town.

At the end of his fourth term, in accordance with the provisions of the new city charter which prohibited the immediate reelection of a mayor, he stepped down; continuing, however, to serve New Orleans in various political capacities, chiefly as a member of the council.t.