Washington, DC

ZIP code 20037 is assigned to Washington, DC, and falls within District of Columbia County. Like every US postal code, it began as a mail-routing device rather than a geographic boundary — the US Postal Service groups delivery routes under a single code so carriers and sorting equipment can process mail efficiently. Today it also serves as a practical shorthand for the area itself: roughly 12,441 people live inside it.

At 16,996 residents per square mile spread over 0.732 square miles, 20037 reads as a dense urban area. It is a mid-sized postal code by population, and density shapes almost everything else on this page — how people get to work, whether they own or rent, and what housing costs.

Household earnings run above the national median. At $98,917, 20037 sits comfortably in the upper half, ahead of 82% of them. The US median for comparison is $70,109. Bear in mind that median income describes the midpoint household, not the average — it is not pulled upward by a handful of very high earners the way a mean would be.

Housing in 20037 costs far above the national median. A typical home is valued at $743,700 against a US median of $207,500, and median gross rent runs $2,420 a month. This is firmly renter territory — 65.0% of occupied homes are rented, a pattern typical of city centres, student areas and neighbourhoods with a lot of apartment stock.

The building stock is dominated by larger apartment buildings of twenty units or more, which account for 81.9% of housing units here. The median construction year is 1975, making the housing here from the later twentieth century.

The population skews younger than the country as a whole, with a median age of 31.3 against 42 nationally. Households average just 1.7 people, and 62.2% consist of one person living alone — a signature of areas with a lot of studio and one-bedroom stock.

Getting to work takes 23.1 minutes on average one way. The dominant mode is worked from home at 38.7% of workers, while 11.8% take public transit, 34.9% walk, 38.7% work from home. Commute patterns are one of the better proxies for how a place actually functions day to day.

Beyond addressing mail, 20037 does a lot of quiet administrative work. Retailers use it to calculate shipping and sales tax at checkout. Insurers use it to set premiums, since risk profiles vary geographically. Employers and marketers use it to define service areas. Government agencies use it to route benefits and organise reporting. If you have ever been asked for a postal code by a form that clearly does not intend to send you anything, this is why.

For anyone weighing a move, 20037 offers a compact profile of Washington: 12,441 residents, a median household income of $98,917, 89.8% of adults holding a bachelor's degree or higher, and an unemployment rate of 5.2%. A handful of figures like these answer more relocation questions than most neighbourhood guides do.

One caution worth repeating: a postal code is not a neighbourhood. 20037 may cover parts of several distinct areas, and a single neighbourhood in Washington may be split across more than one code. Boundaries also shift as USPS adjusts delivery routes. Treat the figures here as describing a delivery area, which is what they actually measure.