ZIP Code 21791

ZIP Code Tabulation Area in Carroll County, Maryland.

Population: 4,734
Median household income: $90,460
Median home value: $370,300

ZIP Code 21791 is a ZIP Code Tabulation Area in Carroll County, Maryland, home to about 4,734 residents. Its median household income of $90,460 runs below the Carroll County figure of $115,876.

Between 2019 and 2023, ZIP Code 21791's population declined 9.7% from 5,245 to 4,734, while its median gross rent rose 23.5% from $1,069 to $1,320.

The typical home was built around 1964. 6.6% of residents live below the poverty line.

Demographics

ACS 2019–2023

Population: 4,734
Median age: 40.9 yrs
Median household income: $90,460
Median home value: $370,300
Median gross rent: $1,320
Housing units: 1,975
Homeownership rate: 83.6%
Bachelor's degree or higher: 26.3%
Unemployment rate: 2.4%

Trends

ACS 5-year · 2019–2023

Population

5,2454,734

Median household income

$86,725$90,460

Median home value

$324,900$370,300

Median gross rent

$1,069$1,320

Year	Population	Median household income	Median home value	Median gross rent
2019	5,245	$86,725	$324,900	$1,069
2020	5,080	$89,335	$336,600	$972
2021	4,794	$93,578	$326,600	$1,139
2022	4,855	$88,984	$349,900	$1,156
2023	4,734	$90,460	$370,300	$1,320

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 55.5%

5 to 1716.3%

18 to 246.0%

25 to 3414.6%

35 to 4412.8%

45 to 549.5%

55 to 6415.9%

65 to 7410.4%

75 and over8.9%

	Count	Share
Under 5	260	5.5%
5 to 17	774	16.3%
18 to 24	286	6.0%
25 to 34	691	14.6%
35 to 44	604	12.8%
45 to 54	448	9.5%
55 to 64	755	15.9%
65 to 74	494	10.4%
75 and over	422	8.9%

Race & ethnicity

	Count	Share
White (non-Hispanic)	4,431	93.6%
Black or African American	87	1.8%
American Indian & Alaska Native	5	0.1%
Asian	102	2.2%
Native Hawaiian & Pacific Islander	0	0.0%
Some other race	0	0.0%
Two or more races	56	1.2%
Hispanic or Latino (any race)	53	1.1%

Educational attainment (age 25+)

No high school diploma5.6%

High school graduate43.2%

Some college or associate's24.9%

Bachelor's degree15.3%

Graduate or professional degree11.0%

	Count	Share
No high school diploma	191	5.6%
High school graduate	1,474	43.2%
Some college or associate's	851	24.9%
Bachelor's degree	521	15.3%
Graduate or professional degree	377	11.0%

Commute to work

Mean travel time to work: 37 min

Drove alone84.3%

Carpooled5.3%

Public transit0.4%

Walked1.8%

Bicycle0.0%

Worked from home8.1%

Other means0.1%

How workers get to work

	Count	Share
Drove alone	2,066	84.3%
Carpooled	130	5.3%
Public transit	10	0.4%
Walked	44	1.8%
Bicycle	0	0.0%
Worked from home	198	8.1%
Other means	2	0.1%

Travel time

	Count	Share
Under 15 min	317	14.1%
15 to 29 min	621	27.6%
30 to 44 min	500	22.2%
45 to 59 min	350	15.5%
60+ min	464	20.6%

Households

Average household size: 2.54
Poverty rate: 6.6% (309 of 4,716)

	Count	Share
Family households	1,302	69.8%
Nonfamily households	563	30.2%

Housing

Median year structure built: 1964

Occupancy

	Count	Share
Occupied	1,865	94.4%
Vacant	110	5.6%

Tenure (of occupied units)

	Count	Share
Owner-occupied	1,559	83.6%
Renter-occupied	306	16.4%

1-unit, detached91.8%

1-unit, attached1.9%

2 to 4 units3.8%

5 to 19 units2.0%

20 or more units0.0%

Mobile home & other0.4%

Units in structure

	Count	Share
1-unit, detached	1,814	91.8%
1-unit, attached	38	1.9%
2 to 4 units	76	3.8%
5 to 19 units	39	2.0%
20 or more units	0	0.0%
Mobile home & other	8	0.4%

ZIP Code 21791

Demographics

Trends

Age distribution

Race & ethnicity

Educational attainment (age 25+)

Commute to work

Households

Housing

Geography

Counties this ZIP covers

Compare with nearby ZIP codes

National ZIP rankings

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