🇺🇸 United States ZIP Code

STANDARD

21244

Windsor Mill

ZIP Code 21244 is a standard zip code serving Windsor Mill, Windsor Mill, Maryland (MD), in Baltimore County, United States. It has an estimated population of 34,611 with a median household income of $59,494. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Maryland (MD)
County: Baltimore
City: Windsor Mill
Timezone: America/New_York

Coordinates

Latitude: 39.333100
Longitude: -76.784900

Geographic Details

Land Area: 13.42 mi²
Water Area: 0.07 mi²
Population Density: 2580.0 people per mi² (85th percentile)
Bounding Box: 39.367481°N, 39.298946°S, -76.743168°E, -76.833522°W

With 34,611 residents spread across 13.42 square miles, this area has a population density of 2580.0 people per square mile.

Demographics

34,611

Population

90th percentile

$59,494

Median Income

70th percentile

$216,400

Median Home Value

75th percentile

13.42 mi²

Land Area

The median household income in 21244 is $59,494, and the median home value is $216,400.

Housing

14,378

Total Units

13,480

Occupied Units

93.8%

Occupancy Rate

Similar ZIP Codes in Maryland

ZIP codes with similar median household income in Maryland.

21220

Middle River

$61,672

21901

North East

$65,951

21668

Sudlersville

$59,091

21742

Hagerstown

$66,169

21719

Cascade

$56,477

20625

Cobb Island

$62,440

21795

Williamsport

$56,332

21212

Baltimore

$61,912

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.