Monmouth, CA population, income and ZIP codes

Monmouth CDP is a very small community in California, with 168 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #1414 of 1,618 ranked by population — larger than 12% of them. The median age here is 24.3 years against 39.1 nationally, a distinctly younger profile, typical of places with students, military posts or a fast-growing family population. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in Monmouth CDP earn a median of $40,673 a year, 48.2% below the national figure of $78,538 and 55% below 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 29.8% of residents here, well above the 12.4% national rate, which is the single clearest signal in this dataset that median income here is carried by a narrow band of households.

The typical owner-occupied home in Monmouth CDP is valued at $113,500, 62.6% below the national figure and 81% below the $589,600 peer median, while median gross rent runs $1,391 a month, 1.1% below the national figure, or roughly $16,692 across a full year. A household on the local median income would put about 41% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is severely stretched — a median-income renter clears the cost-burden line by a wide margin before utilities beyond the gross-rent definition. The home-price-to-income ratio works out to 2.8×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 54.1% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

Monmouth CDP is the unusual combination of expensive to rent and cheap to buy: rent takes 41% of median income while homes cost only 2.8× it. Where that pattern shows up, the gap is normally down to down-payment and credit barriers rather than price. A median age of 24.3 means a large student or early-career population; income medians in places like this understate household resources, since many residents are supported from outside the address.

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.