🇺🇸 United States ZIP Code

STANDARD

20120

Centreville

ZIP Code 20120 is a standard zip code serving Centreville, Centreville, Virginia (VA), in Fairfax County, United States. It has an estimated population of 40,695 with a median household income of $111,272. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Virginia (VA)
County: Fairfax
City: Centreville
Timezone: America/New_York

Coordinates

Latitude: 38.844800
Longitude: -77.467000

Geographic Details

Land Area: 17.17 mi²
Water Area: 0.27 mi²
Population Density: 2370.0 people per mi² (85th percentile)
Bounding Box: 38.895476°N, 38.824538°S, -77.395414°E, -77.536718°W

With 40,695 residents spread across 17.17 square miles, this area has a population density of 2370.0 people per square mile.

Demographics

40,695

Population

95th percentile

$111,272

Median Income

95th percentile

$412,700

Median Home Value

90th percentile

17.17 mi²

Land Area

The median household income in 20120 is $111,272, and the median home value is $412,700. This places the area in the top 25% nationally for household income.

Housing

14,217

Total Units

13,851

Occupied Units

97.4%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Centreville, VA.

20121

Centreville

20122

Centreville

Similar ZIP Codes in Virginia

ZIP codes with similar median household income in Virginia.

22151

Springfield

$99,527

22031

Fairfax

$106,728

20170

Herndon

$104,371

23693

Yorktown

$100,488

23838

Chesterfield

$103,059

20181

Nokesville

$108,438

22180

Vienna

$127,205

20147

Ashburn

$122,115

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.