ZIP code 20636

ZIP 20636 is a mid-size town in St. Mary's County, Maryland, with 10,357 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #179 of 477 ranked by population — larger than 62% of them. The median age here is 39.5 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 ZIP 20636 earn a median of $159,800 a year, 103.5% above the national figure of $78,538. 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 5.5% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in ZIP 20636 is valued at $470,300, 55% above the national figure, while median gross rent runs $1,158 a month, 17.6% below the national figure, or roughly $13,896 across a full year. A household on the local median income would put about 8.7% 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 2.9×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 87.6% 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.

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.

ZIP 20636 is tabulated inside St. Mary's County, Maryland, one of 26 ZIP areas the Census publishes for that county and 477 across Maryland. This is a mid-sized suburban ZIP inside a county that is split across many delivery areas. County assignment on this page follows the largest share of the ZIP's land area, which matters where a delivery route crosses a county line: mail addressed to 20636 can be handled by a post office in a neighbouring county even though the tabulation area is filed here.

Against its own county, 20636 reports a median household income of $159,800, 36% above the $117,501 county median, and 53% above the $104,338 typical MD ZIP. Owner-occupied homes are valued at a median of $470,300, 16% above the county figure and 17% above the statewide ZIP median. Rent is reported gross — the contract amount plus tenant-paid utilities — at $1,158 a month, which is why it reads higher than the advertised rent on a listing for the same unit.

Maryland charges 6% statewide, and no local sales tax is layered on top, so the state rate is the full amount collected in 20636.

Everything above comes from the Census Bureau American Community Survey 2019-2023 ACS 5-year estimates for this ZIP Code Tabulation Area, with sales tax rates traced to the state revenue agency. Five-year estimates pool sixty months of responses, so they are stable enough to compare 20636 with its neighbours but always trail the current year, and any value the Census suppressed for sample size is shown as unpublished rather than filled in with a model.