🇺🇸 United States ZIP Code

STANDARD

21239

Baltimore

ZIP Code 21239 is a standard zip code serving Baltimore, Baltimore, Maryland (MD), in Baltimore (city) County, United States. It has an estimated population of 28,793 with a median household income of $51,331. 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)
City: Baltimore
Timezone: America/New_York

Coordinates

Latitude: 39.361000
Longitude: -76.589100

Geographic Details

Land Area: 3.23 mi²
Population Density: 8904.0 people per mi² (95th percentile)
Bounding Box: 39.390848°N, 39.340694°S, -76.569997°E, -76.600303°W

With 28,793 residents spread across 3.23 square miles, this area has a population density of 8904.0 people per square mile.

Demographics

28,793

Population

85th percentile

$51,331

Median Income

55th percentile

$158,500

Median Home Value

60th percentile

3.23 mi²

Land Area

The median household income in 21239 is $51,331, and the median home value is $158,500.

Housing

12,505

Total Units

11,747

Occupied Units

93.9%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Baltimore, MD.

21201

Baltimore

21202

Baltimore

21203

Baltimore

21205

Baltimore

21206

Baltimore

21209

Baltimore

21210

Baltimore

21211

Baltimore

21212

Baltimore

21213

Baltimore

Similar ZIP Codes in Maryland

ZIP codes with similar median household income in Maryland.

21001

Aberdeen

$58,060

21826

Fruitland

$54,250

21863

Snow Hill

$49,245

21722

Clear Spring

$57,014

20743

Capitol Heights

$57,973

21040

Edgewood

$52,165

20755

Fort George G Meade

$58,643

21557

Rawlings

$45,972

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.