Zip Code 21220
Middle River, Maryland — Baltimore County
📍 ZIP code 21220 is in Middle River, Baltimore County, Maryland.
ZIP code 21220 is located in Middle River, Baltimore County, Maryland. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 42,936. The area code for ZIP code 21220 is 410.
Quick Answer
Zip code 21220 is in Middle River, Maryland (Baltimore County). It has a population of 42,936, median household income of $79,676, and median home value of $279,900.
Population
42,936
Income
$79,676
Home Value
$279,900
Climate
90°F / 30°F
About Zip Code 21220
Zip code 21220 is located in Middle River, Maryland, within Baltimore County. Home to approximately 42,936 residents, this area sits at an elevation of 22 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 410.
The median household income is $79,676 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $279,900, and the cost of living index is 97 (3% below the national average of 100).
Summers average a high of 90°F while winters drop to 30°F. The area receives about 44 in of rain and 8 in of snow annually. The zip code covers 21.6 square miles of land area and 6.5 square miles of water.
Key Statistics
42,936
$79,676
$279,900
Eastern (EST/EDT)
410
22 ft
21.6 sq mi
38
17,960
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Compare With Nearby Zip Codes
| Metric | 21220 | 21162 | 21221 | 21128 | 21237 | 21236 |
|---|---|---|---|---|---|---|
| City | Middle River, MD | Nottingham, MD | Essex, MD | Nottingham, MD | Rosedale, MD | Nottingham, MD |
| Population | 42,936 | 4,511 | 43,536 | 14,954 | 30,851 | 39,653 |
| Median Income | $79,676 | $168,021 | $67,368 | $123,191 | $90,269 | $92,130 |
| Home Value | $279,900 | $463,400 | $266,800 | $424,200 | $280,400 | $306,800 |
| Cost of Living | 97 | 169 | 89 | 154 | 102 | 111 |
| Median Age | 38 | 35.2 | 41.7 | 40.6 | 42.3 | 38.2 |
Cost of Living
100 = National Average. Middle River's cost of living is 3% below the national average.
vs. State Avg
Below
Affordability
Affordable
Income-to-Home
3.5x
Demographics
Zip code 21220 has a population of 42,936 people with a median age of 38. There are 17,960 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Middle River (21220) population trend from 2010 to 2024
↓ -21.8%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
90°F
30°F
44 in
8 in
Middle River experiences hot summers with average highs around 90°F. Winters are cool with lows averaging 30°F. The area receives about 8 in of snow per year.
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Housing & Economy
Median Home Value
$279,900
Median Household Income
$79,676
With 17,960 housing units across 21.6 square miles, 21220 has a housing density of 831 units per square mile. The home price-to-income ratio is 3.5x.
Location & Geography
Latitude
39.3473°
Longitude
-76.3901°
Land Area
21.6 sq mi
Water Area
6.5 sq mi
Nearby Zip Codes
Zip codes closest to 21220 (Middle River, MD) with distances:
Related Cities in Maryland
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 21220's $79,676. A way to compare Middle River to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 21220 (Middle River, MD). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Middle River, Maryland?
Middle River, Maryland uses zip code 21220.
What county is zip code 21220 in?
Zip code 21220 is located in Baltimore County, Maryland.
What is the population of zip code 21220?
The population of zip code 21220 is 42,936 with a median age of 38.
Is 21220 in Middle River, Maryland?
Yes, zip code 21220 is in Middle River, Baltimore County, Maryland. The area code is 410.
Frequently Asked Questions
What city is zip code 21220 in?
Zip code 21220 is in Middle River, Maryland. It is part of Baltimore County and uses the Eastern (EST/EDT) timezone.
What is zip code 21220?
Zip code 21220 is a U.S. postal code in Middle River, Maryland (Baltimore County). It has a population of 42,936 and covers 21.6 square miles.
What is the population of zip code 21220?
The population of zip code 21220 (Middle River, MD) is 42,936 with a median age of 38. There are approximately 17,960 housing units in this area.
What is the median income in zip code 21220?
The median household income in zip code 21220 (Middle River, MD) is $79,676 per year. The cost of living index is 97 (100 = national average).
What is the average home price in zip code 21220?
The median home value in zip code 21220 (Middle River, MD) is $279,900. The cost of living index is 97 compared to the national average of 100.
What county is zip code 21220 in?
Zip code 21220 is located in Baltimore County, Maryland. The primary city is Middle River.
What is the area code for zip code 21220?
Zip code 21220 in Middle River, MD uses area code 410. It is located in the Eastern (EST/EDT) timezone.
Is zip code 21220 a good place to live?
Zip code 21220 (Middle River, MD) has a cost of living index of 97 (100 = national average), a median household income of $79,676, and median home values of $279,900. The median age is 38. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 21220?
The cost of living index for zip code 21220 (Middle River, MD) is 97, where 100 represents the national average. This area is below the national average. Median home value: $279,900.
What schools serve zip code 21220?
Zip code 21220 in Middle River, Maryland is served by the local school district of Baltimore County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.