ZIP Code Tabulation Area · Maryland

ZIP Code 21131: Baltimore County, MD

ZIP Code 21131 (Baltimore County, Maryland) has an estimated 7,141 residents in 2,600 households. The median household income is $197,619, the median home value is $686,000 and the median gross rent is —. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Some estimates have a large margin of error. One figure for this ZIP (bachelor's or higher) is marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

7,141

Margin of error ±872

Median household income

$197,619

Margin of error ±$35,903

Median home value

$686,000

Margin of error ±$41,585

Median gross rent

—

Margin of error not available

Median age

49.4 yrs

Margin of error ±4.2 yrs

Mean travel time to work

30.0 min

Margin of error ±5.7 min

How ZIP 21131 compares with Maryland and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 2113149.4 yrsMaryland39.4 yrsUnited States38.9 yrs

Median household income

ZIP 21131$197,619Maryland$103,678United States$80,734

Per capita income

ZIP 21131$82,991Maryland$52,979United States$44,673

Poverty rate

ZIP 211314.7%Maryland9.4%United States12.5%

Unemployment rate

ZIP 211313.9%Maryland4.9%United States5.2%

Bachelor's degree or higher

ZIP 2113173.9%*Maryland43.4%United States35.7%

Median home value

ZIP 21131$686,000Maryland$419,900United States$332,700

Median gross rent

ZIP 21131—Maryland$1,705/moUnited States$1,413/mo

Owner-occupied homes

ZIP 2113198.4%Maryland67.6%United States65.2%

Mean travel time to work

ZIP 2113130.0 minMaryland31.1 minUnited States26.4 min

Worked from home

ZIP 2113123.3%Maryland19.3%United States15.1%

All figures for ZIP 21131

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 21131 — ACS 2020–2024 5-year estimates
MeasureZIP 21131Margin of errorMarylandUnited States
Total population7,141±8726,206,011334,922,499
Median age49.4 yrs±4.2 yrs39.4 yrs38.9 yrs
Households2,600±2852,362,928129,227,496
Median household income$197,619±$35,903$103,678$80,734
Per capita income$82,991±$10,241$52,979$44,673
Poverty rate4.7%±2.9 pts9.4%12.5%
Unemployment rate3.9%±2.1 pts4.9%5.2%
Bachelor's degree or higher73.9%*±12.6 pts43.4%35.7%
Median home value$686,000±$41,585$419,900$332,700
Median gross rent——$1,705/mo$1,413/mo
Owner-occupied homes98.4%±2.5 pts67.6%65.2%
Mean travel time to work30.0 min±5.7 min31.1 min26.4 min
Worked from home23.3%±8.0 pts19.3%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 21131
GroupZIP 21131MarylandUnited States
White alone, not Hispanic or Latino92.8%46.6%57.4%
Black or African American alone, not Hispanic or Latino0.7%28.9%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.1%0.1%0.5%
Asian alone, not Hispanic or Latino1.3%6.5%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.0%0.0%0.2%
Some other race alone, not Hispanic or Latino0.8%0.7%0.6%
Two or more races, not Hispanic or Latino2.8%4.6%4.3%
Hispanic or Latino (of any race)1.5%12.5%19.3%

Where ZIP 21131 is

State
Maryland
Main county
Baltimore County
Largest overlapping place
Cockeysville (3% of the ZIP's land area)
Land area
21.03 sq mi· about 340 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Baltimore County

21051 Baltimore County, MD21052 Edgemere, MD21053 Baltimore County, MD21057 Baltimore County, MD21071 Baltimore County, MD21082 Baltimore County, MD21087 Kingsville, MD21093 Timonium, MD21111 Baltimore County, MD21117 Owings Mills, MD21120 Baltimore County, MD21128 Honeygo, MD21133 Randallstown, MD21136 Baltimore County, MD21152 Baltimore County, MD21153 Pikesville, MD21155 Baltimore County, MD21156 Kingsville, MD21162 Honeygo, MD21163 Baltimore County, MD21204 Towson, MD21207 Lochearn, MD21208 Pikesville, MD21209 Baltimore, MD

See every ZIP code in Maryland, or compare ZIP 21131 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.