Balboa Island is an area of Newport Beach, California actually comprising three modified or artificial islands in Newport Harbor: Balboa Island, the largest; the smaller Little Balboa Island to the east of Balboa Island, joined by a two-lane bridge; and the smallest Collins Island to the northwest of Balboa Island, joined by a one-lane bridge.

The Balboa Island community is joined to the mainland by a short two-lane bridge on the northeast of Balboa Island, and a privately-operated fleet of three, three-car ferryboats (Balboa Island Ferry) which provide access across the harbor to the Balboa Peninsula which lies to the south.