Aptos Hills-Larkin Valley is an unincorporated community in Santa Cruz County, California, United States. It is identified as one of several small communities with a combined population of 24,402 forming the unincorporated town of Aptos by the local Chamber of Commerce along with:Aptos Village Cabrillo Seacliff, south of State Route 1, west of Aptos Creek Rio Del Mar, south of State Route 1, from Aptos Creek southeast to Seascape Seascape, south of State Route 1, centered on Seascape Beach Resort