The 92120 zip code area is about 6.7 sq. miles with the estimated population in 2016 of about 28,927. The renters are at 32% with 11,965 houses/condos and 3,595 renter occupied apartments. You have the 8 highway running along the southern boundary of the 92120 zip code. Areas of town include Levanto, Del Cerro, Allied Gardens, Grantville and a very small part of San Carlos.