Paul Lional Edward Helliwell (1915 - 24 December 1976) was an American lawyer and CIA agent "instrumental" in setting up Civil Air Transport and according to the Wall Street Journal, "deeply involved" in financing covert actions against Cuba from 1964 to 1975. Helliwell was reported to have been instrumental in the purchase of the site for Disney World.
Helliwell joined the United States Army during World War II. Later he transferred to the Office of Strategic Services (OSS). In 1943, with the rank of Colonel, he became head of the Secret Intelligence Branch of the OSS in Europe. William Casey eventually replaced him in 1945. Helliwell then became chief of the Far East Division of the War Department's Strategic Service unit. In 1947, Helliwell joined the CIA.
Helliwell continued to work as a lawyer in Miami and served as legal counsel to a Panamanian holding company that controlled a Bahamian gambling casino connected with Meyer Lansky.
Helliwell, suffering from emphysema, died of a collapsed lung at his home in Coral Gables, Florida on December 24, 1976. He was survived by his wife, Marjorie, and a daughter, Anne.