ZIP Code Tabulation Area · Maryland

ZIP Code 21009: Bel Air South, MD

ZIP Code 21009 (Bel Air South, Harford County, Maryland) has an estimated 33,679 residents in 12,940 households. The median household income is $121,660, the median home value is $357,100 and the median gross rent is $1,838/mo. 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

Total population

33,679

Margin of error ±1,979

Median household income

$121,660

Margin of error ±$7,447

Median home value

$357,100

Margin of error ±$8,117

Median gross rent

$1,838/mo

Margin of error ±$128

Median age

36.2 yrs

Margin of error ±1.1 yrs

Mean travel time to work

30.7 min

Margin of error ±3.9 min

How ZIP 21009 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 2100936.2 yrsMaryland39.4 yrsUnited States38.9 yrs

Median household income

ZIP 21009$121,660Maryland$103,678United States$80,734

Per capita income

ZIP 21009$52,073Maryland$52,979United States$44,673

Poverty rate

ZIP 210094.3%Maryland9.4%United States12.5%

Unemployment rate

ZIP 210093.7%Maryland4.9%United States5.2%

Bachelor's degree or higher

ZIP 2100941.3%Maryland43.4%United States35.7%

Median home value

ZIP 21009$357,100Maryland$419,900United States$332,700

Median gross rent

ZIP 21009$1,838/moMaryland$1,705/moUnited States$1,413/mo

Owner-occupied homes

ZIP 2100982.4%Maryland67.6%United States65.2%

Mean travel time to work

ZIP 2100930.7 minMaryland31.1 minUnited States26.4 min

Worked from home

ZIP 2100915.3%Maryland19.3%United States15.1%

All figures for ZIP 21009

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 21009 — ACS 2020–2024 5-year estimates
MeasureZIP 21009Margin of errorMarylandUnited States
Total population33,679±1,9796,206,011334,922,499
Median age36.2 yrs±1.1 yrs39.4 yrs38.9 yrs
Households12,940±6672,362,928129,227,496
Median household income$121,660±$7,447$103,678$80,734
Per capita income$52,073±$2,134$52,979$44,673
Poverty rate4.3%±1.3 pts9.4%12.5%
Unemployment rate3.7%±0.9 pts4.9%5.2%
Bachelor's degree or higher41.3%±1.9 pts43.4%35.7%
Median home value$357,100±$8,117$419,900$332,700
Median gross rent$1,838/mo±$128$1,705/mo$1,413/mo
Owner-occupied homes82.4%±3.6 pts67.6%65.2%
Mean travel time to work30.7 min±3.9 min31.1 min26.4 min
Worked from home15.3%±2.9 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 21009
GroupZIP 21009MarylandUnited States
White alone, not Hispanic or Latino69.6%46.6%57.4%
Black or African American alone, not Hispanic or Latino16.4%28.9%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.0%0.1%0.5%
Asian alone, not Hispanic or Latino4.2%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 Latino0.3%0.7%0.6%
Two or more races, not Hispanic or Latino4.1%4.6%4.3%
Hispanic or Latino (of any race)5.4%12.5%19.3%

Where ZIP 21009 is

State
Maryland
Main county
Harford County
Largest overlapping place
Bel Air South (61% of the ZIP's land area)
Land area
11.40 sq mi· about 2,954 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 Harford County

21001 Aberdeen, MD21005 Aberdeen Proving Ground, MD21010 Edgewood, MD21014 Bel Air North, MD21015 Bel Air South, MD21017 Riverside, MD21028 Harford County, MD21034 Harford County, MD21040 Edgewood, MD21047 Fallston, MD21050 Bel Air North, MD21078 Harford County, MD21084 Jarrettsville, MD21085 Joppatowne, MD21130 Perryman, MD21132 Pylesville, MD21154 Harford County, MD21160 Harford County, MD21161 Harford County, MD

See every ZIP code in Maryland, or compare ZIP 21009 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.