Washington, DC

ZIP code 20019 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 64,365 people live inside it.

At 10,490 residents per square mile spread over 6.136 square miles, 20019 reads as a dense urban area. It is one of the more heavily populated postal codes in the country, 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 below the national median. At $57,031, 20019 sits in the lower half, ahead of 27% 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 20019 costs well above the national median. A typical home is valued at $437,600 against a US median of $207,500, and median gross rent runs $1,174 a month. The split between owning and renting is fairly even at 40.7% owner-occupied, which tends to indicate a mix of housing types rather than one dominant form.

The building stock is dominated by detached single-family houses, which account for 47.1% of housing units here. The median construction year is 1958, making the housing here mid-century.

The population skews younger than the country as a whole, with a median age of 33.8 against 42 nationally. The average household holds 2.43 people, and 54.5% are family households.

Getting to work takes 38.0 minutes on average one way. The dominant mode is drove alone at 43.8% of workers, while 26.5% take public transit, 16.2% work from home. Commute patterns are one of the better proxies for how a place actually functions day to day.

Beyond addressing mail, 20019 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, 20019 offers a compact profile of Washington: 64,365 residents, a median household income of $57,031, 25.2% of adults holding a bachelor's degree or higher, and an unemployment rate of 15.3%. 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. 20019 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.