Daniel A. Haggerty (1884-1965), was a Queens politician who served as the Queens Sewer Commissioner and Democratic leader of the Ninth Assembly District for 35 years. For the last forty years of his life, Haggerty lived in Hollis, Queens.

Haggerty was born in Brooklyn and moved to Queens after leaving school. He worked for the Charles H. Eddy advertising agency, where was employed for 43 years. While at the Eddy firm, Haggerty was elected Democratic leader of the Ninth Assembly in central Queens. In the early 1940s, Haggerty retired from the advertising agency and entered the Queens political arena full time. 

Haggerty served as secretary to Supreme Court Justice Charles Colden from 1943 to 1956, and then as chief clerk to Queens District Attorney Frank D. O’Connor from 1956 to 1959. He was a vice-chairman of the Queens County Democratic Committee, until 1954 when he was elected Queens County Democratic leader. In 1959, Queens Borough President John T. Clancy named Haggerty sewer commissioner for Queens.