Harry Hayden (8 November 1882 – 24 July 1955) was a Canadian-American actor. He was a highly prolific actor, with more than 280 screen credits.

Hayden was born in Nova Scotia, Canada, in 1882. He is best known to modern audiences as middle-aged, greying at the temples, and wearing glasses, assaying small-town store proprietors, hotel managers, city attorneys, bankers and minor bureaucrats, often warm-hearted, but frequently officious or snooping.

Hayden worked both onstage and in films, and with his wife, actress Lela Bliss, to whom he was married from 1924 until his death, he ran the Bliss-Hayden miniature theatre in Beverly Hills, whose alumni include Veronica Lake, Doris Day, Debbie Reynolds, and Marilyn Monroe. He directed one production on Broadway,^{[citation needed]} a play called Thirsty Soil, which opened in February 1937.

Hayden began appearing in films in 1936, when he was seen in Foolproof, a crime drama short,^{[citation needed]} and worked consistently and steadily until 1954. At the peak of his career in the late 1930s and early 1940s, he appeared in a dozen or two films a year. Often his work went uncredited, but he was notable in Laurel and Hardy's Saps at Sea in 1940 as Mr. Sharp, the horn factory owner, and as Farley Granger's boss in 1951's O. Henry's Full House. In the 1940s, Hayden was part of Preston Sturges' unofficial "stock company" of character actors, appearing in six films written and directed by Sturges.

Hayden did a handful of episodic television shows from 1951 to 1955. In 1952, he played Stephen Wilson, the father of Margie's boyfriend in the episode "Vern's Chums", in "My Little Margie", he also had a recurring role as "Harry Johnson" on The Stu Erwin Show, also known as The Trouble With Father, although he went uncredited when the show went to syndication. In 1954, he appeared in his final film, The Desperado.

Hayden had one son with actress Lela Bliss, Harry Hayden.^{[citation needed]} He died on 24 July 1955 in West Los Angeles, California, at the age of 72.