Knox ZIP codes — Knox County, Maine

Knox County is a small city in Maine, with 40,860 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates. The median age here is 49.2 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 Knox County earn a median of $71,903 a year, 8.4% below the national figure of $78,538. 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 8.8% of residents here, below the 12.4% national rate.

The typical owner-occupied home in Knox County is valued at $290,800, 4.2% below the national figure, while median gross rent runs $1,079 a month, 23.3% below the national figure, or roughly $12,948 across a full year. A household on the local median income would put about 18% 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 4×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 78.5% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

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.