Balboa Island is a harborside community in Newport Beach, California, accessible to the public via bridge, ferry and several public docks. The community is surrounded by a paved concrete boardwalk open to pedestrian traffic, designated as a public walking trail by the city.

Balboa Island's Marine Avenue is home to local small businesses including restaurants, bakeries, fishing & tackle, and local crafts. The island also has a fire station and a post office.