San Martin, CA population, income and ZIP codes

San Martin CDP is a mid-size town in California, with 7,199 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #568 of 1,618 ranked by population — larger than 64% of them. The median age here is 49.6 years against 39.1 nationally, a markedly older profile that usually tracks retirees staying put and younger households leaving for work. 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 San Martin CDP earn a median of $156,292 a year, 99% above the national figure of $78,538 and 72% above the $91,111 median for the 1,050 California cities we cover. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 6.5% of residents here, below the 12.4% national rate.

The typical owner-occupied home in San Martin CDP is valued at $1,315,900, 333.7% above the national figure and 123% above the $589,600 peer median, while median gross rent runs $2,332 a month, 65.9% above the national figure, or roughly $27,984 across a full year. A household on the local median income would put about 17.9% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 8.4×, 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. 74.7% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Rent is reported gross — contract rent plus tenant-paid utilities — which is why it runs above the advertised price on a listing for the same unit.

Home values sit at 8.4× 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.