A 1906 photograph of Doyle Carlton, future Florida Governor standing in center, on the campus of Stetson University in DeLand, Florida.

Doyle Elam Carlton, the son of Albert and Martha Winfield McEwen Carlton, was born in Wauchula, Florida on July 6, 1885. He was born eighth out of ten children. He received his primary education in Wauchula and, as there was then no local high school, attended Stetson Academy where he served as an editor for the school newspaper and officer of the Phi Kappa Delta Society (later to become Delta Sigma Phi). He subsequently graduated from the Liberal Arts College of Stetson University with an A.B. in 1909. Doyle then attended The University of Chicago where he received an A.B. in 1910. He earned his L.L.B. in 1912 from Columbia University. In 1912, he was admitted to the practice of law in Florida and practiced law in Tampa beginning in that year. On July 30, 1912, in Tampa, Doyle married Nell Ray, daughter of Edward Dennis and Mary Ellen Smith Ray.

His political career began in 1916 when he was elected to the Florida state senate for a two-year term as the State Senator from the 11th District, composed of Hillsborough and Pinellas counties.

After serving in the State Senate, Carlton would serve as Tampa's city attorney from 1925 to 1927. William J. Howey would claim during his gubernatorial campaign run in 1928 that Carlton would get large fees from selling municipal bonds when he was attorney and dodged serving in World War I.

In the Democratic primary on June 5, 1928 he received 77,569 first choice and 28,471 second choice votes to win in a field of five candidates, who included former Governor Sidney J. Catts. In November 1928, Doyle defeated his Republican opponent, William John Howey, by a margin of 148,455 votes to 95,018 votes. He assumed the office of governor on January 8, 1929. During Carlton's campaign he ran on the platform of "good government, good schools, and good roads".