Cornelius Joseph "Neil" Haggerty (January 10, 1894 – October 10, 1971) was an American labor union leader. He served as President of the California Labor Federation from 1937 to 1943, then as Executive Secretary-Treasurer from 1943 to 1960.
Haggerty began working full-time for his union as an organizer on the West Coast, later becoming a vice-president of the union. In 1933, he was elected as president of the Los Angeles Building and Construction Trades Council. He became president of the Californian State Federation of Labor in 1937, and then secretary in 1943.[1][2]