Harbor Island is in Newport Beach, California. Newport Harbor is a semi-artificial harbor that was formed by dredging an estuary during the early 1900s. Several artificial islands were built, including Harbor Island, now covered with about thirty private homes. It is a gated community. It is one of the most exclusive islands with homes listed for 10s of millions. Notable residents include George Argyros, Donald Bren, and Bill Gross.[1]