Hanford is a commercial and cultural center in the south-central San Joaquin Valley and the county seat of Kings County, California, United States. It is the principal city of the Hanford-Corcoran metropolitan area, which encompasses all of Kings County, including the cities of Hanford and Corcoran. The ZIP Code is 93230. The city of Hanford is surrounded by communities that do not fall within the city limits but share the same ZIP Code.