Martha Smith (born Martha Anne Smith on October 16, 1953 in Cleveland, Ohio) is an American model and actress. She is sometimes credited as Martha L. Smith.

Martha Smith has starred in 13 movies, such as National Lampoon's Animal House, and has appeared in several TV series as a guest star. She was a regular on the adventure series Scarecrow and Mrs. King, and appeared as a frequent panelist on The $25,000 Pyramid. Later on, she got into real estate and also got involved in the political reform movement.

In July 1973, she was chosen Playboy magazine's Playmate of the Month. Her centerfold was photographed by Pompeo Posar.