Marriottsville ZIP Codes — Carroll County, MD

There is one unique ZIP code in Marriottsville, Maryland and it is 21104. Area code: 443/410.

ZIP codes

17.05

sq mi land

0.81

sq mi water

443/410

area code

Marriottsville, MD ZIP code map

About Marriottsville, MD

Marriottsville is a charming community located in Carroll County, Maryland. Nestled in the scenic landscape, it offers a peaceful suburban atmosphere with a close-knit community feel. Residents enjoy the tranquil setting that combines rural charm with convenient access to urban amenities.

Location & geography

Marriottsville lies approximately 25 miles west of Baltimore, providing easy access to the city for work and leisure. The area encompasses a total land area of 17.05 square miles, complemented by a small water area of 0.81 square miles. This serene environment features both wooded hills and open fields, contributing to its picturesque landscape.

Community & economy

The character of Marriottsville is defined by its friendly and welcoming residents, many of whom appreciate the area's natural beauty and recreational opportunities. The local economy is supported by small businesses and agriculture, with residents often engaged in various industries and trades. Daily life here tends to be relaxed, with community events and outdoor activities playing a significant role in the social scene.

Transportation

Major highways near Marriottsville include Route 70 and Route 32, which provide convenient access for commuters traveling to nearby cities. The nearest named airports are Baltimore/Washington International Thurgood Marshall Airport, located about 30 miles to the east, and Frederick Municipal Airport, which is approximately 18 miles away. Public transportation options are limited, primarily serving those traveling to larger regional hubs.

History

Marriottsville was founded in the early 19th century and has since maintained its character as a rural community within Carroll County. Historically, the area has been associated with agriculture and local industries, contributing to its growth and development. Notable events in the area often include community gatherings and seasonal festivals that celebrate the region's heritage.

Did you know?

One surprising fact about Marriottsville is its close proximity to the scenic Patapsco Valley State Park, which offers numerous recreational activities such as hiking, fishing, and picnicking. The community is also known for its beautiful landscapes that attract nature enthusiasts and families alike.

ZIP codes for Marriottsville, MD (1)

ZIP code	City	County	Map
21104	Marriottsville	Carroll	View map

Demographics & statistics

6,077

Population

46.1

Median age

$195,000

Median household income

$70,089

Per capita income

$659,400

Median home value

Median monthly rent

95.0%

Home ownership

2.3%

Poverty rate

1.5%

Unemployment

1,971

Housing units

57.4%

Bachelor's or higher

Age distribution

Male Female

138

Under 5

141

151

5–9

154

230

10–14

234

181

15–19

184

237

20–24

242

222

25–34

227

328

35–44

335

395

45–54

403

309

55–59

315

243

60–64

247

369

65–74

375

158

75–84

160

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,304	21.5%
18 and over	4,773	78.5%
65 and over	1,161	19.1%
Median age	46.1 years

Race & ethnicity

White 74.4%

Asian 10.3%

Two or more races 5.5%

Black or African American 5.3%

Hispanic or Latino 3.9%

Other race 0.6%

Group	Count	%
White	4,707	74.4%
Asian	650	10.3%
Two or more races	345	5.5%
Black or African American	335	5.3%
Hispanic or Latino	249	3.9%
Other race	40	0.6%

Household income

Under $10k 0.8%

$10k–$15k 3.1%

$15k–$25k 1.1%

$25k–$35k 1.7%

$35k–$50k 4.4%

$50k–$75k 6.5%

$75k–$100k 5.2%

$100k–$150k 16.8%

$150k–$200k 14.1%

$200k+ 46.3%

Range	% of households
Under $10k	0.8%
$10k–$15k	3.1%
$15k–$25k	1.1%
$25k–$35k	1.7%
$35k–$50k	4.4%
$50k–$75k	6.5%
$75k–$100k	5.2%
$100k–$150k	16.8%
$150k–$200k	14.1%
$200k+	46.3%
Median income	$195,000

Housing

Home values

$100k–$150k 1.2%

$200k–$300k 0.8%

$300k–$500k 18.9%

$500k–$1M 74.5%

$1M+ 4.5%

Housing overview

Metric	Value
Median home value	$659,400
Median rent / month	$0
Owner occupied	95.0%
Renter occupied	5.0%
Vacant	2.3%
Single-family detached	87.6%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	8.3
Avg household size (owned)	3.05

Year built

Era	%
2020 or later	0.9%
2010–2019	20.3%
2000–2009	17.6%
1990–1999	21.0%
1980–1989	16.3%
1970–1979	16.9%
1960–1969	2.5%
1950–1959	2.1%
1940–1949	0.3%
1939 or earlier	2.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	4.8%
3 bedrooms	36.0%
4 bedrooms	42.6%
5+ bedrooms	16.5%

Vehicles per household

Vehicles	% of households
No vehicle	0.6%
1 vehicle	13.6%
2 vehicles	40.1%
3 or more	45.6%

Heating fuel

Fuel type	%
Utility gas	34.9%
Electricity	37.9%
Propane / LP gas	7.3%
Fuel oil	12.2%
Wood	4.0%
No fuel used	3.1%

Households & families

Household type	Count	%
Married-couple family	1,442	71.2%
Cohabiting couple	85	4.2%
Male householder, no spouse	60	3.0%
Female householder, no spouse	439	21.7%
Households with children under 18	704	34.7%
Households with seniors (65+)	774	38.2%
Average household size	2.98

Marital status

Status	Male	Female
Never married	24.8%	24.3%
Married	65.7%	56.4%
Separated	0.0%	0.2%
Widowed	0.8%	10.4%
Divorced	8.8%	8.7%

Education

Less than 9th grade 2.5%

Some HS, no diploma 0.4%

HS graduate 19.7%

Some college, no degree 16.6%

Associate's degree 3.5%

Bachelor's degree 36.4%

Graduate / professional 21.0%

Metric	%
HS diploma or higher	97.1%
Bachelor's or higher	57.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	124	8.3%
Kindergarten	36	2.4%
Elementary school	631	42.1%
High school	329	22.0%
College / grad school	378	25.2%

Employment

Industry of employment

Education & healthcare 27.7%

Professional & management 17.3%

Finance & real estate 9.8%

Arts, food & hospitality 8.9%

Public administration 7.9%

Manufacturing 6.3%

Retail trade 5.0%

Construction 4.3%

Transportation & utilities 4.3%

Other services 3.8%

Wholesale trade 2.9%

Information 1.8%

Occupation

Category	%
Management, business & arts	64.2%
Service	10.1%
Sales & office	15.3%
Natural resources & construction	5.4%
Production & transportation	5.0%

Employment type

Type	%
Private sector	78.1%
Government	17.8%
Self-employed	3.9%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	79.2%
Carpool	3.3%
Public transit	0.3%
Walk	0.3%
Other means	0.0%
Avg commute (minutes)	31.5

Poverty

All people 2.3%

Under 18 years 0.5%

18 and over 2.8%

Married-couple families 0.6%

Female-led households 8.1%

Income support

Source	% of households
Social Security	30.8%
Retirement income	27.6%
Supplemental Security	2.2%
Cash public assistance	0.3%
Food stamps / SNAP	0.7%

Health indicators

Condition	%
High blood pressure	30.1%
High cholesterol	34.5%
Heart disease	4.4%
Stroke	2.1%
Asthma	8.7%
Arthritis	21.9%
Kidney disease	2.1%
Pulmonary disease	4.3%
Cancer	6.6%

Behavior / access	%
Binge drinking	15.4%
No physical activity	15.6%
Less than 7 hrs sleep	28.3%
Fair or poor health	8.2%
Poor mental health	11.9%
Poor physical health	6.8%
No health insurance	6.6%
Visited doctor (checkup)	76.5%
Visited dentist	74.8%
Cholesterol screening	94.0%
Teeth loss	6.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	295	6.2%

Disability	%
Any disability	7.2%
Under 18	4.3%
18–64 years	5.7%
65 and over	15.4%

Health insurance coverage

Type	%
Private insurance	90.6%
Public insurance	24.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	5,798	95.4%
Spanish	251	4.3%
Other Indo-European	0	0.0%
Asian & Pacific Islander	25	0.4%
Other languages	226	3.9%

Place of birth & citizenship

Origin	Count	%
Native born (US)	5,308	87.3%
Born in same state	5,203	85.6%
Born in different state	3,399	55.9%
Foreign born	105	1.7%
Naturalized citizen	769	12.7%
Not a US citizen	645	83.9%

Ancestry

Ancestry	Count	%
Italian	1,176	19.4%
French	517	8.5%
Arab	189	3.1%
Norwegian	71	1.2%

Ancestry	Count	%
Polish	49	0.8%
English	31	0.5%
Irish	17	0.3%
Dutch	14	0.2%

Technology access

Metric	% of households
Computer access	33.3%
Internet access	96.7%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Marriottsville, MD have?

Marriottsville, MD has one ZIP code: 21104. Each ZIP code serves a distinct delivery area within the city and surrounding region.