Bay Farm Island is a district of the city of Alameda, California, though it is separated from the rest of the city on Alameda Island by an estuary of San Leandro Bay.

In addition, the area was the site of large oyster beds which regularly supplied restaurants in nearby San Francisco.

The largest development on Bay Farm is named "Harbor Bay Isle", generally bounded to the north and west portion of the island by Island Drive and Mecartney Road.

The latter is named for aviator Amelia Earhart, who started many of her flights from the nearby Oakland Airport.

In the weekday mornings and afternoons there are student only bus rides from neighborhoods on Bay Farm Island to various local schools.