Alum Rock, CA population, income and ZIP codes

Alum Rock CDP is a mid-size town in California, with 11,619 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #457 of 1,618 ranked by population — larger than 71% of them. The median age here is 40.3 years against 39.1 nationally, a slightly older profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in Alum Rock CDP earn a median of $111,976 a year, 42.6% above the national figure of $78,538 and 23% above the $91,111 median for the 1,050 California cities we cover. Household income here is measured before tax and pooled across everyone at the address, which is why it reads higher than typical individual earnings in the same area. Poverty reaches 8.7% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Alum Rock CDP is valued at $880,000, 190% above the national figure and 49% above the $589,600 peer median, while median gross rent runs $2,412 a month, 71.6% above the national figure, or roughly $28,944 across a full year. A household on the local median income would put about 25.8% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is within the standard affordability guideline. The home-price-to-income ratio works out to 7.9×, against roughly 3.9× nationally, so buying is out of reach on local earnings alone and the ownership market leans on outside income, equity or dual high earners. 70.4% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

Home values sit at 7.9× median household income, far past the 3.9× national mark, so ownership costs here are set by something other than local wages — second homes, retirees with equity, or commuters earning elsewhere.

All values below were released by the Census for this exact geography, with no gap-filling on our side. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.