🇺🇸 United States ZIP Code

STANDARD

20018

Washington

ZIP Code 20018 is a standard zip code serving Washington, Washington, District of Columbia (DC), in District of Columbia County, United States. It has an estimated population of 16,894 with a median household income of $52,317. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: District of Columbia (DC)
County: District of Columbia
City: Washington
Timezone: America/New_York

Coordinates

Latitude: 38.927700
Longitude: -76.976200

Geographic Details

Land Area: 3.02 mi²
Water Area: 0.01 mi²
Population Density: 5602.0 people per mi² (95th percentile)
Bounding Box: 38.946358°N, 38.909999°S, -76.941923°E, -77.001409°W

With 16,894 residents spread across 3.02 square miles, this area has a population density of 5602.0 people per square mile.

Demographics

16,894

Population

75th percentile

$52,317

Median Income

60th percentile

$355,500

Median Home Value

90th percentile

3.02 mi²

Land Area

The median household income in 20018 is $52,317, and the median home value is $355,500.

Housing

7,652

Total Units

7,005

Occupied Units

91.5%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Washington, DC.

20001

Washington

20002

Washington

20003

Washington

20004

Washington

20005

Washington

20006

Washington

20007

Washington

20008

Washington

20009

Washington

20010

Washington

Similar ZIP Codes in District of Columbia

ZIP codes with similar median household income in District of Columbia.

20017

Washington

$56,980

20011

Washington

$54,488

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.