Oceanside, CA is located in San Diego County. It is home to 98226 people. The median household income is $36,277.00 (Source: 2000 Census). The average home value was $167,800.00 (Source: 2000 Census). Nearby towns and cities include National City, Santee, San Marcos, Escondido, Poway. Find listings of real estate for sale in Oceanside below.