Frederick Edwin Beir (September 21, 1927 – June 3, 1980) was an American film and television actor.

Beir was born in Niagara Falls, New York, He began his career in 1950, appearing in the television series The Philco Television Playhouse. He also appeared on Broadway in The Terrible Swift Sword (1955). He continued to star or co-star in films and guest-star in television programs.

TV programs on which Beir appeared included The Odd Couple, Kolchak: The Night Stalker, The Andy Griffith Show, Gomer Pyle, U.S.M.C., The Outer Limits, Wagon Train, The Time Tunnel, Mission: Impossible, Mannix, The Six Million Dollar Man, Hawaii Five-O, The Rockford Files, Barnaby Jones, Man From Atlantis, Dallas and The Twilight Zone. He also starred and co-starred in films, such as The Violators, Assassination, Fort Courageous, Three Dollars of Lead, M.M.M. 83 and The Organization. Beir's last screen appearance was in the TV series Lou Grant in 1980.

Beir died on June 3, 1980, of cancer in Los Angeles, California, at the age of 52. He was buried in Forest Lawn Memorial Park.