21029 ZIP Code — Clarksville, MD

Howard County, Maryland

ZIP code 21029 is located in Clarksville, Maryland, within Howard County. It covers approximately 16.92 square miles and serves a population of 13,817 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 240.

About ZIP code 21029

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $882,700. Owner-occupancy is high at 93%, well above the national average.

The gap between median ($238,095) and mean household income suggests income inequality — a small number of higher earners pull the average up.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 34 minutes is near the national average.

Educational attainment is high — 83% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 21029 reflects a community defined by a highly educated population and high homeownership.

13,817

population

16.92

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21029 ZIP code map

Cities in ZIP code 21029

Below are the cities the US Postal Service accepts for ZIP code 21029. Using any city not on this list may result in mail delivery delays.

City	Status
Clarksville	Preferred

Nearby ZIP codes

20777 Highland (2.2 mi) 20759 Fulton (3.1 mi) 21044 Columbia (3.7 mi) 21036 Dayton (3.8 mi) 20861 Ashton (4.3 mi) 21737 Glenelg (5.3 mi) 20860 Sandy Spring (5.6 mi) 20868 Spencerville (5.7 mi) 20833 Brookeville (5.7 mi) 21042 Ellicott City (5.8 mi) 21794 West Friendship (6.3 mi) 20723 Laurel (6.3 mi)

Demographics updated 06/2026

Population
Total population	13,817
Population density	817 / sq mi
State FIPS	24
County FIPS	027

Geography
Land area	16.92 sq mi
Water area	0.33 sq mi
Latitude	39.2037
Longitude	-76.9511
Timezone	Eastern (ET)
Area code	240

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	7.3%	17.1%	28.2%
$50k – $100k	9.7%	22.9%	28.2%
$100k – $200k	30.1%	34.8%	30.1%
Over $200k	52.9%	25.2%	13.4%

Demographics & statistics

13,817

Population

817

People per sq mi

42.8

Median age

$238,095

Median household income

$81,396

Per capita income

$882,700

Median home value

$3,100

Median monthly rent

92.5%

Home ownership

1.3%

Poverty rate

2.2%

Unemployment

3,797

Housing units

82.5%

Bachelor's or higher

Age distribution

Male Female

187

Under 5

183

467

5–9

457

768

10–14

751

645

15–19

630

399

20–24

390

469

25–34

458

752

35–44

735

1,349

45–54

1,319

760

55–59

742

373

60–64

365

516

65–74

504

258

75–84

252

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	3,773	27.3%
18 and over	10,044	72.7%
65 and over	1,618	11.7%
Median age	42.8 years

Race & ethnicity

White 41.7%

Asian 40.5%

Black or African American 9.1%

Two or more races 4.3%

Hispanic or Latino 2.7%

Other race 1.1%

Native Hawaiian / Pacific Islander 0.5%

American Indian / Alaska Native 0.1%

Group	Count	%
White	5,916	41.7%
Asian	5,751	40.5%
Black or African American	1,293	9.1%
Two or more races	605	4.3%
Hispanic or Latino	383	2.7%
Other race	157	1.1%
Native Hawaiian / Pacific Islander	76	0.5%
American Indian / Alaska Native	19	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	7.3%	17.1%	28.2%
$50k – $100k	9.7%	22.9%	28.2%
$100k – $200k	30.1%	34.8%	30.1%
Over $200k	52.9%	25.2%	13.4%

Under $10k 1.3%

$15k–$25k 0.2%

$25k–$35k 1.0%

$35k–$50k 2.3%

$50k–$75k 2.2%

$75k–$100k 6.1%

$100k–$150k 10.1%

$150k–$200k 12.3%

$200k+ 64.5%

Range	% of households
Under $10k	1.3%
$15k–$25k	0.2%
$25k–$35k	1.0%
$35k–$50k	2.3%
$50k–$75k	2.2%
$75k–$100k	6.1%
$100k–$150k	10.1%
$150k–$200k	12.3%
$200k+	64.5%
Median income	$238,095

Housing

Home values

Under $50k 0.8%

$50k–$100k 0.1%

$100k–$150k 0.4%

$150k–$200k 0.6%

$200k–$300k 0.6%

$300k–$500k 4.8%

$500k–$1M 62.7%

$1M+ 30.0%

Housing overview

Metric	Value
Median home value	$882,700
Median rent / month	$3,100
Owner occupied	92.5%
Renter occupied	7.5%
Vacant	1.6%
Single-family detached	89.5%
Large apartment buildings	3.1%
Mobile homes	0.0%
Median rooms	10.0
Avg household size (owned)	3.43

Year built

Era	%
2020 or later	0.1%
2010–2019	11.9%
2000–2009	32.9%
1990–1999	30.5%
1980–1989	8.5%
1970–1979	7.5%
1960–1969	3.2%
1950–1959	3.9%
1940–1949	0.0%
1939 or earlier	1.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.2%
1 bedroom	0.2%
2 bedrooms	2.8%
3 bedrooms	12.3%
4 bedrooms	46.1%
5+ bedrooms	38.4%

Vehicles per household

Vehicles	% of households
No vehicle	0.8%
1 vehicle	7.0%
2 vehicles	43.9%
3 or more	48.3%

Heating fuel

Fuel type	%
Utility gas	51.5%
Electricity	31.9%
Propane / LP gas	6.8%
Fuel oil	8.7%
Solar	0.2%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	3,438	85.2%
Cohabiting couple	69	1.7%
Male householder, no spouse	101	2.5%
Female householder, no spouse	426	10.6%
Households with children under 18	2,059	51.0%
Households with seniors (65+)	1,029	25.5%
Average household size	3.42

Marital status

Status	Male	Female
Never married	30.3%	21.6%
Married	66.6%	66.3%
Separated	0.4%	1.5%
Widowed	0.5%	4.9%
Divorced	2.2%	5.7%

Education

Less than 9th grade 0.3%

Some HS, no diploma 0.4%

HS graduate 5.5%

Some college, no degree 6.9%

Associate's degree 4.5%

Bachelor's degree 34.8%

Graduate / professional 47.7%

Metric	%
HS diploma or higher	99.4%
Bachelor's or higher	82.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	217	4.8%
Kindergarten	169	3.7%
Elementary school	2,061	45.4%
High school	1,199	26.4%
College / grad school	895	19.7%

Employment

Industry of employment

Education & healthcare 27.6%

Professional & management 24.2%

Public administration 17.3%

Construction 5.5%

Finance & real estate 4.9%

Other services 4.7%

Arts, food & hospitality 4.6%

Retail trade 4.4%

Manufacturing 3.7%

Information 1.0%

Transportation & utilities 0.9%

Wholesale trade 0.7%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	77.9%
Service	5.2%
Sales & office	9.9%
Natural resources & construction	3.6%
Production & transportation	3.3%

Employment type

Type	%
Private sector	69.7%
Government	26.1%
Self-employed	4.1%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	74.7%
Carpool	5.1%
Public transit	2.7%
Walk	0.6%
Work from home	16.5%
Other means	0.4%
Avg commute (minutes)	33.5

Poverty

All people 1.3%

Under 18 years 1.5%

18 and over 1.2%

Married-couple families 0.5%

Female-led households 7.8%

Income support

Source	% of households
Social Security	22.6%
Retirement income	19.8%
Supplemental Security	2.5%
Cash public assistance	1.1%
Food stamps / SNAP	0.9%

Health indicators

Condition	%
Obesity	22.8%
High blood pressure	27.7%
High cholesterol	33.7%
Diabetes	7.5%
Heart disease	3.7%
Stroke	1.7%
Asthma	7.6%
Arthritis	17.9%
Kidney disease	1.9%
Pulmonary disease	3.0%
Cancer	5.8%

Behavior / access	%
Smoking	7.2%
Binge drinking	12.3%
No physical activity	14.0%
Less than 7 hrs sleep	29.8%
Depression	14.1%
Fair or poor health	6.3%
Poor mental health	9.9%
Poor physical health	5.3%
No health insurance	5.5%
Visited doctor (checkup)	75.8%
Visited dentist	78.6%
Cholesterol screening	95.0%
Teeth loss	4.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	268	2.7%

Disability	%
Any disability	5.3%
Under 18	2.9%
18–64 years	3.9%
65 and over	18.7%

Health insurance coverage

Type	%
Private insurance	94.2%
Public insurance	14.1%
No insurance	1.0%
Uninsured under 19	0.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	13,447	97.3%
Spanish	972	7.2%
Other Indo-European	23	0.2%
Asian & Pacific Islander	201	1.5%
Other languages	708	5.3%

Place of birth & citizenship

Origin	Count	%
Native born (US)	10,014	72.5%
Born in same state	9,790	70.9%
Born in different state	5,126	37.1%
Foreign born	224	1.6%
Naturalized citizen	3,803	27.5%
Not a US citizen	3,118	82.0%

Ancestry

Ancestry	Count	%
Italian	1,391	10.1%
French	639	4.6%
Arab	625	4.5%
German	112	0.8%
Irish	71	0.5%

Ancestry	Count	%
Polish	48	0.3%
Norwegian	31	0.2%
English	17	0.1%
Dutch	14	0.1%

Technology access

Metric	% of households
Computer access	29.2%
Internet access	98.7%

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

Frequently asked questions about ZIP code 21029

What city is ZIP code 21029 in?

ZIP code 21029 is primarily assigned to Clarksville, Maryland.

What county is ZIP code 21029 in?

ZIP code 21029 falls within Howard County, Maryland.

How educated is the population of ZIP code 21029?

83% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 21029 mostly owner-occupied?

93% of occupied units in ZIP code 21029 are owner-occupied, well above the national average.

What is the median household income in ZIP code 21029?

The median household income in ZIP code 21029 is $238,095, above the national median of ~$75,000.

What is the typical home value in ZIP code 21029?

The median home value in ZIP code 21029 is $882,700.

What timezone is ZIP code 21029 in?

ZIP code 21029 observes the EST timezone.