Carroll County

Carroll County has 175,321 residents across 9 ZIP codes with their own report. Median household income is $118,211, 14% above the Maryland figure. The typical owner-occupied home is valued at $434,000, and 41% of adults 25 and over hold a bachelor’s degree or higher.

County · ACS 2020–2024 · Updated October 24, 2026

175,321residentsACS 2020–2024

$118,211median household incomeMaryland: $104K

$434,000median home valueowner-occupied homes

93%of households have broadbandhome internet subscription

Carroll County in MarylandZIP codes in Carroll County highlighted; the rest of Maryland in grey

Map of Maryland with Carroll County highlighted

Sources: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates · U.S. Census Bureau, 2024 Gazetteer and 2020 ZCTA relationship files

All 9 ZIP codes.

Colour shows where each zip code sits among the others in the table, from lowest to highest.

ZIP code	Residents	Household income	Home value	Owners	Bachelor's+	Broadband	Commute
21048	10,481	$132K	$459K	98%	47%	94%	41 min
21074	14,777	$109K	$378K	87%	36%	93%	36 min
21102	12,162	$135K	$393K	89%	35%	94%	39 min
21157	38,984	$105K	$424K	77%	38%	91%	34 min
21158	22,083	$110K	$385K	79%	36%	92%	40 min
21757	2,671	$101K	$466K	82%	30%	90%	33 min
21776	6,261	$133K	$462K	93%	38%	86%	45 min
21784	39,258	$139K	$492K	87%	53%	96%	36 min
21787	11,645	$92K	$355K	78%	22%	89%	39 min

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

People.

175,321 residents in 64,285 households, next to the Maryland figure.

22%

under 18

19%

aged 18–34

18%

aged 65 and over

22%

of households are people living alone

62%

of households are married couples

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Homes.

66,768 housing units; the median owner-occupied home is valued at $434,000 (±$5,460).

84%

of households own their home

78%

of homes are detached single-family houses

are in buildings with 5 or more units

are mobile homes

of housing units are vacant

$1,427

median gross rent a month

When homes were built

2020 or later2%

2010–20195%

2000–200914%

1990–199918%

1980–198918%

1970–197918%

1960–19698%

1950–19594%

1940–19492%

1939 or earlier12%

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Income and work.

Household income and work, in 2024 dollars; median household income ±$3,883.

$118,211

median household income

5.2%

of people live below the poverty line

3.5%

unemployment rate

41%

of adults 25+ hold a bachelor’s degree or higher

The poverty rate uses the federal poverty thresholds, which vary with family size. It says nothing on its own about what a neighborhood is like to live in.

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Getting around.

How workers aged 16 and over get to work, and how long it takes.

37 min

average commute to work

35%

of commuters travel 45 minutes or more

81%

of workers drive or carpool

take public transportation

walk or bike

17%

work from home

of households have no car

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates

Internet.

Home internet subscriptions.

93%

of households have a broadband subscription

have no internet access at home

American Community Survey figures are estimates from a rolling sample, averaged over 2020–2024. Each comes with a margin of error, which is wider in places with fewer people.

Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates