Signal Hill is a city (2.2 mi², 5.7 km²) in California located in the Greater Los Angeles area. Situated on a hill, the city is an enclave completely surrounded by the city of Long Beach. Signal Hill was incorporated on April 22, 1924, roughly three years after oil was discovered there. As of the 2010 census, the city population was 11,465.Signal Hill lies in the 562 area code. The city once shared three different postal ZIP codes with the city of Long Beach but in July 2002, the city of Signal Hill received its own ZIP code, 90755.HistoryThe hill that the city is named after is 365 feet above the surrounding town of Long Beach. Because of this height, it was used by the local Tongva Indians for signal fires that could be seen throughout the surrounding area and even out to Catalina Island, 26mi away.After the Spanish claimed Alta California, Signal Hill eventually became part of the first large rancho grant to be allotted under Spanish rule in Alta California. The Rancho San Pedro land grant exceeded 74000acre as granted to a soldier, Juan Jose Dominguez, who accompanied Junipero Serra, by Governor Fages through authority of King Carlos III of Spain in 1784.
