Martha Bronson is a fictional recurring character in the American television sitcom Leave It to Beaver.

In the 1997 film adaptation of the series, Leave It to Beaver, Aunt Martha is played by Barbara Billingsley.

Martha makes her first appearance in the first-season episode, "Beaver's Short Pants" when she steps in to take care of Ward and the boys while June visits an out-of-town sister who has given birth.

Martha's "old maid" mindset and way of doing things irks the rugged Cleaver males.

Although Beaver gives the idea some consideration, he finally tells Martha he would rather attend Mayfield High with the friends he has known for years.