The Balboa Peninsula is a neighborhood of the city of Newport Beach, Orange County, California. It is named for the famous Spanish explorer, Vasco Núñez de Balboa. Balboa is primarily residential but has some commercial areas as well. About three miles (5 km) long, the Peninsula consists of all the contiguous land east of 45th Street. Most of the business is concentrated along Balboa Boulevard where it meets Pacific Coast Highway, McFadden Place, and Main Street. The peninsula acts as a jetty enclosing the Newport Harbor and its islands. Historical buildings include Balboa Pavilion (established 1906), the Balboa Theater (established 1928), and the Balboa Inn (established 1929). Balboa Island Ferry Terminal on Balboa Peninsula.