| City: | Washington, District of Columbia |
| Names to Avoid: | Dept Interior |
| County: | District Of Columbia County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:52:09 PM |
| Population: | No Population Data |
| Area Codes: | 202 / 771 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 38.8942, -77.0426 |
| Land Area: | 0.012 sq mi |
| Quick Link: |
The U.S. Department of the Interior operates under dedicated ZIP code 20240 at 1849 C Street NW in Washington, D.C. Founded in 1849, Interior is the nation's principal conservation agency, managing approximately 500 million acres of federal land and holding responsibilities for Indian affairs, territorial administration, and resource conservation. The Main Interior Building serves as the department's headquarters.
Postal records identify 9 delivery points across 7 building designations including Department of Interior facilities and multiple U.S. Fish and Wildlife Service locations on C Street, H Street, I Street, K Street, and L Street near the Washington Mall. The Fish and Wildlife Service, a major Interior bureau, manages the 150-million-acre National Wildlife Refuge System comprising 563 refuges.
This boundary-defined designation covers 0.02 square miles in the Washington Mall neighborhood. Census County Business Patterns reports 12 establishments with 157 employees at this ZIP. The USPS established the agency alias in August 2012. Census demographic data is not available for this federal headquarters designation. Washington serves as the valid mailing city.
| Establishments: | 12 |
| Employment: | 157 |
| Residential: | 0 |
| Business: | 1 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 20240 has 0 residents and 0 households. Age detail is not available. Gender breakdown is not available. Race and ethnicity breakdown is not available.
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 0Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 0.0 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 0Source: Census DHC |
| Average House Value: | $666,666,666Source: Census ACS |
| Persons Per Household: | 0.00Source: Census DHC |
| Average Family Size: | 0.00Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0 | -- | -- | -- | -- |
Median Age: 0
Male Median Age: 0
Female Median Age: 0
| 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 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Female | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| White: | 0 | 0% |
| Black: | 0 | 0% |
| Hispanic:* | 0 | 0% |
| Asian: | 0 | 0% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 0 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 0 | 0% | 0.0 years |
| Females: | 0 | 0% | 0.0 years |
| Total: | 0 | 100% | 0.0 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% |
In 2024, -666,666,666.00% of adults (25+) have a bachelor's degree or higher, which is markedly below the state rate (63.60%). High school or higher is -666,666,666.00%, which is markedly below the state rate (92.80%). The uninsured rate is -666,666,666.00%, which is far lower than the national rate (8.60%). Private coverage is -666,666,666.00%, which is markedly below the state rate (72.40%). Public coverage is -666,666,666.00%, which is far lower than the national rate (36.30%). The share of people in poverty is -666,666,666.00%, which is markedly below the state rate (10.70%). Poverty has been broadly stable, which may reflect structural barriers or offsetting gains and setbacks. Insufficient data for school enrollment.
Explore More: Educational Attainment Health Insurance Poverty Over Time School Enrollment
| Less than 9th grade: | 0 | 0% |
| 9th to 12th grade, no diploma: | 0 | 0% |
| High school graduate (includes equivalency): | 0 | 0% |
| Some college, no degree: | 0 | 0% |
| Associate's degree: | 0 | 0% |
| Bachelor's degree: | 0 | 0% |
| Graduate or professional degree: | 0 | 0% |
| Total: | 0 | 100% |
| High school or higher: | 0 | 0% |
| Bachelor's degree or higher: | 0 | 0% |
| Private Insurance: | 0 | 0% |
| Public Insurance: | 0 | 0% |
| No Insurance: | 0 | 0% |
| Total: | 0 | 100% |
| Has Health Insurance: | 0 | 0% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 0.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 0 | 0% |
| Kindergarten: | 0 | 0% |
| Elementary school (grades 1-8): | 0 | 0% |
| High school (grades 9-12): | 0 | 0% |
| College or graduate school: | 0 | 0% |
| Total: | 0 | 100% |
| Early Childhood: | 0 | 0% |
| K-12 (Primary & Secondary School): | 0 | 0% |
ZIP Code 20240 supports both business and residential activity. According to the Business Census (2024), there are 10 business establishments, employing about 126 people with an annual payroll of $8,671,000. 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: | 10Source: CBP |
| 1st Quarter Payroll: | $2,403,000Source: CBP |
| Annual Payroll: | $8,671,000Source: CBP |
| # of Employees: | 126Source: CBP |
ZIP Code 20240 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 5,582,170 people, about 0.00% of whom live in ZIP Code 20240, and is subdivided into the Washington, DC-MD division. It covers 0.012 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: | 5,582,170Source: Census |
| MSA: | Washington-Baltimore, DC-MD-VA-WV CMSASource: Census |
| Land Area: | 0.012 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 20240 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 February 1, 2026.