🇺🇸 United States ZIP Code

STANDARD

21218

Baltimore

ZIP Code 21218 is a standard zip code serving Baltimore, Baltimore, Maryland (MD), in Baltimore (city) County, United States. It has an estimated population of 49,796 with a median household income of $38,261. 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: 39.326500
Longitude: -76.604800

Geographic Details

Land Area: 4.18 mi²
Water Area: 0.12 mi²
Population Density: 11902.0 people per mi² (95th percentile)
Bounding Box: 39.346713°N, 39.310955°S, -76.574768°E, -76.625917°W

With 49,796 residents spread across 4.18 square miles, this area has a population density of 11902.0 people per square mile.

Demographics

49,796

Population

95th percentile

$38,261

Median Income

20th percentile

$152,900

Median Home Value

60th percentile

4.18 mi²

Land Area

The median household income in 21218 is $38,261, and the median home value is $152,900. This is below the national average for household income.

Housing

23,730

Total Units

19,860

Occupied Units

83.7%

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.

20710

Bladensburg

$42,962

21613

Cambridge

$41,001

21225

Brooklyn

$37,487

21632

Federalsburg

$42,683

21875

Delmar

$40,507

21550

Oakland

$41,250

21871

Westover

$41,696

21740

Hagerstown

$42,979

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.