John L. Sullivan (July 20, 1891 – October 13, 1949) was an American lawyer and politician who served as the Attorney General of Arizona from 1935–1937 and from 1944–1948.

[1] In 1916, Sullivan began practicing law, but was interrupted by the United States' entry into World War I.

After that, he unsuccessfully ran for Arizona's newly created congressional seat, but lost the Democratic nomination to John R. Murdock who went on to win the election in 1942.

After Conway's resignation in 1944, Sullivan won another term as Attorney General and was re-elected in 1946.

Sullivan was involved in attempts to legalize casinos in Arizona and was rumored to have accepted bribes from people who operated gambling houses on Route 66.