Castine, ME population, income and ZIP codes

Castine CDP is a very small community in Maine, with 926 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #111 of 155 ranked by population — larger than 28% of them. The median age here is 20.5 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 Castine CDP earn a median of $143,229 a year, 82.4% above the national figure of $78,538 and 143% above the $58,992 median for the 106 Maine cities we cover. The median is the midpoint household, not an average, so a handful of very high earners cannot drag it upward the way they distort a mean. Poverty reaches 0.8% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in Castine CDP is valued at $658,200, 116.9% above the national figure and 197% above the $221,600 peer median, while median gross rent runs not published a month. The home-price-to-income ratio works out to 4.6×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 87.3% of occupied homes are owner-occupied versus 65% nationally, an owner-dominated market where rental listings are scarce and rent medians rest on a thin sample. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

A median age of 20.5 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. With 926 residents, a handful of survey responses moves every median on this page. Compare Castine CDP against its county rather than against national figures.

The Census withheld gross rent for Castine CDP because the sample was too thin to publish at this geography. Those values were suppressed at the source, not lost in our dataset, and we do not model a replacement. Everything else on this page comes straight from the ACS 2019-2023 ACS 5-year tables.