| City: | Washington, District of Columbia |
| Names to Avoid: | US House Of Representatives |
| County: | District Of Columbia County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:10:15 AM |
| Population: | 4 [See All] |
| Area Codes: | 202 / 771 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 38.8881, -77.0102 |
| Land Area: | 0.036 sq mi |
| Quick Link: |
ZIP code 20515 is the exclusive mailing address for the United States House of Representatives, the lower chamber of Congress. All 435 Representatives, their staff, House committees, and support offices receive mail at this single ZIP code. The standard address format is: U.S. House of Representatives, Washington, D.C. 20515.
The House occupies the south wing of the U.S. Capitol building, with additional office space in three House office buildings: the Cannon, Longworth, and Rayburn buildings. These structures house the offices of Representatives from all 50 states, the District of Columbia's non-voting delegate, and delegates from U.S. territories.
Postal facilities within this ZIP code include the HOB (House Office Building) Post Office on Independence Avenue and 2nd Street, as well as the US Capitol Post Office, which serve the congressional community with mail processing and delivery services.
| Population: | 4 |
| Median Age: | 47.0 |
| Housing Units: | 1 |
| Establishments: | 40 |
| Employment: | 343 |
| Residential: | 0 |
| Business: | 1 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 20515 has 4 residents and 1 households (average 4.00 persons per household). The median age is 47.0 years, significantly older than the state (33.9) and significantly older than the nation (38.8). The gender split is 75.0% male and 25.0% female, which is much higher than the state male share (46.8%), making this a male-majority area. Largest groups are White (50.0%, much higher than the state average of 39.6% and well below the national average of 61.6%) and Asian (50.0%, much higher than the state average of 4.9% and well above the national average of 6.0%); Hispanic or Latino residents make up 0.0%, which is much lower than the national average (18.7%), and Asian share is much higher than both the state (4.9%) and national averages (6.0%).
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 4Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 111.1 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 1Source: Census DHC |
| Average House Value: | $0Source: Census ACS |
| Persons Per Household: | 4.00Source: Census DHC |
| Average Family Size: | 2.00Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 4 | -- | -- | -- |
Median Age: 47
Male Median Age: 45.5
Female Median Age: 72.5
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Female | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Total | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| White: | 2 | 50.00% |
| Black: | 0 | 0% |
| Hispanic:* | 0 | 0% |
| Asian: | 2 | 50.00% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 4 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 3 | 75.00% | 45.5 years |
| Females: | 1 | 25.00% | 72.5 years |
| Total: | 4 | 100% | 47.0 years |
| Native, born in the United States: | 0 | 0% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0% |
| Foreign born, naturalized U.S. citizen: | 0 | 0% |
| Foreign born, not a U.S. citizen: | 0 | 0% |
| Total Population: | 0 | 100% |
| Total Native Population: | 0 | 0% |
| Total Foreign-born Population: | 0 | 0% |
ZIP Code 20515 supports both business and residential activity. According to the Business Census (2024), there are 40 business establishments, employing about 323 people with an annual payroll of $17,480,000. USPS data shows 0 residential mailboxes and 1 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 1Source: USPS |
| Total Delivery Receptacles: | 1Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 40Source: CBP |
| 1st Quarter Payroll: | $4,932,000Source: CBP |
| Annual Payroll: | $17,480,000Source: CBP |
| # of Employees: | 323Source: CBP |
ZIP Code 20515 is located in District Of Columbia County, District of Columbia, within the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area (CBSA 47900) and District of Columbia's 98th Congressional District. This Metro area has a population of 6,263,796 people, about 0.00% of whom live in ZIP Code 20515, and is subdivided into the Washington, DC-MD division. It covers 0.036 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Washington-Arlington-Alexandria, DC-VA-MD-WVSource: Census |
| CBSA Number: | 47900Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Washington, DC-MD (CBSA Div 47764)Source: Census |
| CBSA Population: | 6,263,796Source: Census |
| MSA: | Washington-Baltimore, DC-MD-VA-WV CMSASource: Census |
| Land Area: | 0.036 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 98Source: USPS |
| Congressional Land Area: | 61.40 sq miSource: Census |
| PMSA: | Washington, DC-MD-VA-WV PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 1150000Source: Census |
| Place Name: | Washington city; District of ColumbiaSource: Census |
We could not locate which school district 20515 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on January 1, 2026.