ZIP Code Tabulation Area · Maryland

ZIP Code 21648: Madison, MD

ZIP Code 21648 (Madison, Dorchester County, Maryland) has an estimated 172 residents in 70 households. The median household income is —, the median home value is $195,000 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 Oct 26, 2026

Some estimates have a large margin of error. 6 figures for this ZIP (poverty rate, unemployment, bachelor's or higher, owner-occupied, commute, work from home) are marked with *. ACS figures come from a sample, and small areas have fewer responses, so treat these numbers as rough ranges.

Total population

172

Margin of error ±71

Median household income

—

Margin of error not available

Median home value

$195,000

Margin of error ±$69,409

Median gross rent

—

Margin of error not available

Median age

61.4 yrs

Margin of error ±19.5 yrs

Mean travel time to work

23.7 min*

Margin of error ±24.0 min· estimate has a large margin of error

How ZIP 21648 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 2164861.4 yrsMaryland39.4 yrsUnited States38.9 yrs

Median household income

ZIP 21648—Maryland$103,678United States$80,734

Per capita income

ZIP 21648$42,655Maryland$52,979United States$44,673

Poverty rate

ZIP 2164824.4%*Maryland9.4%United States12.5%

Unemployment rate

ZIP 216480.0%*Maryland4.9%United States5.2%

Bachelor's degree or higher

ZIP 2164813.0%*Maryland43.4%United States35.7%

Median home value

ZIP 21648$195,000Maryland$419,900United States$332,700

Median gross rent

ZIP 21648—Maryland$1,705/moUnited States$1,413/mo

Owner-occupied homes

ZIP 2164891.4%*Maryland67.6%United States65.2%

Mean travel time to work

ZIP 2164823.7 min*Maryland31.1 minUnited States26.4 min

Worked from home

ZIP 216480.0%*Maryland19.3%United States15.1%

All figures for ZIP 21648

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 21648 — ACS 2020–2024 5-year estimates
Measure	ZIP 21648	Margin of error	Maryland	United States
Total population	172	±71	6,206,011	334,922,499
Median age	61.4 yrs	±19.5 yrs	39.4 yrs	38.9 yrs
Households	70	±29	2,362,928	129,227,496
Median household income	—	—	$103,678	$80,734
Per capita income	$42,655	±$20,840	$52,979	$44,673
Poverty rate	24.4%*	±25.3 pts	9.4%	12.5%
Unemployment rate	0.0%*	±18.4 pts	4.9%	5.2%
Bachelor's degree or higher	13.0%*	±18.2 pts	43.4%	35.7%
Median home value	$195,000	±$69,409	$419,900	$332,700
Median gross rent	—	—	$1,705/mo	$1,413/mo
Owner-occupied homes	91.4%*	±20.1 pts	67.6%	65.2%
Mean travel time to work	23.7 min*	±24.0 min	31.1 min	26.4 min
Worked from home	0.0%*	±19.7 pts	19.3%	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 21648
Group	ZIP 21648	Maryland	United States
White alone, not Hispanic or Latino	84.3%	46.6%	57.4%
Black or African American alone, not Hispanic or Latino	1.7%	28.9%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.0%	0.1%	0.5%
Asian alone, not Hispanic or Latino	6.4%	6.5%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.0%	0.2%
Some other race alone, not Hispanic or Latino	2.9%	0.7%	0.6%
Two or more races, not Hispanic or Latino	1.7%	4.6%	4.3%
Hispanic or Latino (of any race)	2.9%	12.5%	19.3%

Where ZIP 21648 is

State: Maryland
Main county: Dorchester County
Largest overlapping place: Madison (22% of the ZIP's land area)
Land area: 9.38 sq mi· about 18 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 Dorchester County

21613 Dorchester County, MD 21622 Dorchester County, MD 21626 Dorchester County, MD 21627 Dorchester County, MD 21631 Dorchester County, MD 21634 Dorchester County, MD 21643 Dorchester County, MD 21659 Dorchester County, MD 21664 Secretary, MD 21669 Taylors Island, MD 21672 Dorchester County, MD 21675 Dorchester County, MD 21677 Dorchester County, MD 21835 Dorchester County, MD 21869 Dorchester County, MD

See every ZIP code in Maryland, or compare ZIP 21648 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.