Daniel William Lawler was Mayor of Saint Paul, Minnesota.
He was born in Prairie du Chien, Wisconsin.
He became a lawyer. He was a Roman Catholic. Lawler was an unsuccessful candidate for Governor of Minnesota 1892, losing to Knute Nelson. He was mayor of Saint Paul from 1908 to 1910.
In 1912, he ran for the United States Senate from Minnesota, losing once again to Nelson. He also unsuccessfully ran for the Senate in 1916, losing to future United States Secretary of State Frank B. Kellogg. Lawler was also a delegate to the Democratic National Convention that year.