William Post Jr. (February 19, 1901 – September 26, 1989) was an American actor and drama instructor.

In the 1930s and 1940s, Post appeared in motion pictures and Broadway productions in supporting roles of varied prominence,[1] but was notable as one of the six actors to portray the character of John Perry on the radio soap opera, John's Other Wife.

[2] His acting career from the early 1950s onward, however, was spent exclusively and extensively in television.

[4] His appearances on Broadway Television Theatre included productions of "The Night Cap", "The Fortune Hunter", "Three Cornered Moon".

[5] On Broadway, Post appeared in Richard III (1953), Love Goes to Press (1947), Calico Wedding (1945), My Sister Eileen (1940), Boyd's Daughter (1940), Madame Capet (1938), The Merry Wives of Windsor (1938), Many Mansions (1937), King Richard II (1937), Three Wise Fools (1936), A Touch of Brimstone (1935), The Eldest (1935), Strangers at Home (1934), Ah, Wilderness!