21136 ZIP Code — Reisterstown, MD

Baltimore County, Maryland

ZIP code 21136 is located in Reisterstown, Maryland, within Baltimore County. It covers approximately 56.20 square miles and serves a population of 35,038 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410.

About ZIP code 21136

The housing stock consists of a mix of housing types. Most homes were built in the 1990s, giving the area an established character. Median home value is $375,400. Owner-occupancy is high at 78%, well above the national average.

The gap between median ($105,300) and mean household income suggests income inequality — a small number of higher earners pull the average up. 32% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average.

Educational attainment is high — 52% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 21136 reflects a community defined by a highly educated population, high homeownership, and a significant Social Security-dependent population.

35,038

population

56.20

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

21136 ZIP code map

Cities in ZIP code 21136

Below are the cities the US Postal Service accepts for ZIP code 21136. Using any city not on this list may result in mail delivery delays.

City	Status
Reisterstown	Preferred

Nearby ZIP codes

21117 Owings Mills (3.8 mi) 21117 Owings Mills (3.8 mi) 21155 Upperco (5.8 mi) 21155 Upperco (5.8 mi) 21048 Finksburg (6 mi) 21048 Finksburg (6 mi) 21152 Sparks Glencoe (7.5 mi) 21152 Sparks Glencoe (7.5 mi) 21133 Randallstown (7.7 mi) 21133 Randallstown (7.7 mi) 21208 Pikesville (8.1 mi) 21208 Pikesville (8.1 mi)

Demographics updated 05/2026

Population
Total population	35,038
Population density	623 / sq mi
State FIPS	24
County FIPS	005

Geography
Land area	56.20 sq mi
Water area	1.65 sq mi
Latitude	39.4857
Longitude	-76.7990
Timezone	Eastern (ET)
Area code	443/410

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	27.7%	31.4%	28.2%
$50k – $100k	27.7%	30.7%	28.2%
$100k – $200k	28.8%	28.5%	30.1%
Over $200k	15.8%	9.5%	13.4%

Demographics & statistics

35,038

Population

623

People per sq mi

43.5

Median age

$105,300

Median household income

$55,461

Per capita income

$375,400

Median home value

$1,469

Median monthly rent

78.1%

Home ownership

8.8%

Poverty rate

6.6%

Unemployment

11,378

Housing units

52.1%

Bachelor's or higher

Age distribution

Male Female

749

Under 5

828

1,089

5–9

1,204

769

10–14

850

1,422

15–19

1,573

785

20–24

868

1,887

25–34

2,088

2,103

35–44

2,326

2,316

45–54

2,561

1,355

55–59

1,499

1,212

60–64

1,340

1,785

65–74

1,975

837

75–84

926

328

85+

363

← Male

Female →

Age summary

Group	Count	%
Under 18	7,220	20.6%
18 and over	27,818	79.4%
65 and over	6,214	17.7%
Median age	43.5 years

Race & ethnicity

White 53.9%

Black or African American 26.4%

Asian 7.5%

Two or more races 5.6%

Hispanic or Latino 3.8%

Other race 2.6%

American Indian / Alaska Native 0.2%

Group	Count	%
White	19,616	53.9%
Black or African American	9,626	26.4%
Asian	2,729	7.5%
Two or more races	2,055	5.6%
Hispanic or Latino	1,371	3.8%
Other race	943	2.6%
American Indian / Alaska Native	69	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	27.7%	31.4%	28.2%
$50k – $100k	27.7%	30.7%	28.2%
$100k – $200k	28.8%	28.5%	30.1%
Over $200k	15.8%	9.5%	13.4%

Under $10k 4.6%

$10k–$15k 3.1%

$15k–$25k 4.6%

$25k–$35k 4.6%

$35k–$50k 7.7%

$50k–$75k 13.1%

$75k–$100k 10.1%

$100k–$150k 18.6%

$150k–$200k 14.0%

$200k+ 19.6%

Range	% of households
Under $10k	4.6%
$10k–$15k	3.1%
$15k–$25k	4.6%
$25k–$35k	4.6%
$35k–$50k	7.7%
$50k–$75k	13.1%
$75k–$100k	10.1%
$100k–$150k	18.6%
$150k–$200k	14.0%
$200k+	19.6%
Median income	$105,300

Housing

Home values

Under $50k 1.9%

$50k–$100k 1.5%

$100k–$150k 3.1%

$150k–$200k 2.5%

$200k–$300k 24.6%

$300k–$500k 37.7%

$500k–$1M 24.8%

$1M+ 3.9%

Housing overview

Metric	Value
Median home value	$375,400
Median rent / month	$1,469
Owner occupied	78.1%
Renter occupied	21.9%
Vacant	4.4%
Single-family detached	61.7%
Large apartment buildings	5.0%
Mobile homes	0.0%
Median rooms	6.9
Avg household size (owned)	2.54

Year built

Era	%
2020 or later	0.1%
2010–2019	6.4%
2000–2009	12.7%
1990–1999	18.5%
1980–1989	14.8%
1970–1979	15.5%
1960–1969	15.1%
1950–1959	8.9%
1940–1949	2.6%
1939 or earlier	5.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	8.2%
2 bedrooms	16.7%
3 bedrooms	36.1%
4 bedrooms	27.2%
5+ bedrooms	11.2%

Vehicles per household

Vehicles	% of households
No vehicle	6.0%
1 vehicle	29.1%
2 vehicles	41.5%
3 or more	23.4%

Heating fuel

Fuel type	%
Utility gas	51.0%
Electricity	34.4%
Propane / LP gas	3.8%
Fuel oil	9.9%
Wood	0.5%
No fuel used	0.1%

Households & families

Household type	Count	%
Married-couple family	6,975	50.7%
Cohabiting couple	841	6.1%
Male householder, no spouse	1,489	10.8%
Female householder, no spouse	4,447	32.3%
Households with children under 18	4,071	29.6%
Households with seniors (65+)	4,493	32.7%
Average household size	2.52

Marital status

Status	Male	Female
Never married	33.9%	32.4%
Married	54.6%	43.5%
Separated	1.2%	2.5%
Widowed	4.0%	8.1%
Divorced	6.3%	13.6%

Education

Less than 9th grade 2.9%

Some HS, no diploma 3.2%

HS graduate 17.7%

Some college, no degree 16.6%

Associate's degree 7.5%

Bachelor's degree 28.4%

Graduate / professional 23.7%

Metric	%
HS diploma or higher	93.9%
Bachelor's or higher	52.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	405	4.9%
Kindergarten	406	4.9%
Elementary school	3,241	39.2%
High school	2,287	27.6%
College / grad school	1,939	23.4%

Employment

Industry of employment

Education & healthcare 27.8%

Professional & management 14.5%

Finance & real estate 10.1%

Retail trade 7.7%

Manufacturing 7.5%

Arts, food & hospitality 7.5%

Public administration 7.5%

Other services 5.2%

Construction 5.1%

Transportation & utilities 3.3%

Information 1.7%

Wholesale trade 1.3%

Agriculture & mining 0.9%

Occupation

Category	%
Management, business & arts	55.7%
Service	12.4%
Sales & office	19.4%
Natural resources & construction	4.5%
Production & transportation	8.0%

Employment type

Type	%
Private sector	75.9%
Government	18.5%
Self-employed	5.3%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	73.1%
Carpool	8.5%
Public transit	2.5%
Walk	0.3%
Work from home	14.0%
Other means	1.5%
Avg commute (minutes)	31.9

Poverty

All people 8.8%

Under 18 years 12.9%

18 and over 7.7%

Married-couple families 4.7%

Female-led households 9.8%

Income support

Source	% of households
Social Security	31.8%
Retirement income	21.8%
Supplemental Security	6.0%
Cash public assistance	3.0%
Food stamps / SNAP	11.3%

Health indicators

Condition	%
Obesity	30.7%
High blood pressure	32.5%
High cholesterol	32.7%
Diabetes	8.6%
Heart disease	5.0%
Stroke	2.5%
Asthma	9.8%
Arthritis	23.6%
Kidney disease	2.5%
Pulmonary disease	5.0%
Cancer	6.5%

Behavior / access	%
Smoking	13.4%
Binge drinking	15.2%
No physical activity	20.4%
Less than 7 hrs sleep	31.9%
Depression	18.7%
Fair or poor health	11.5%
Poor mental health	14.0%
Poor physical health	7.8%
No health insurance	9.5%
Visited doctor (checkup)	76.5%
Visited dentist	67.6%
Cholesterol screening	93.0%
Teeth loss	9.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,649	5.9%

Disability	%
Any disability	11.3%
Under 18	5.3%
18–64 years	8.7%
65 and over	27.4%

Health insurance coverage

Type	%
Private insurance	77.1%
Public insurance	34.6%
No insurance	3.8%
Uninsured under 19	0.7%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	33,461	95.5%
Spanish	1,825	5.5%
Other Indo-European	199	0.6%
Asian & Pacific Islander	1,409	4.2%
Other languages	207	0.6%

Place of birth & citizenship

Origin	Count	%
Native born (US)	29,717	84.8%
Born in same state	29,386	83.9%
Born in different state	20,456	58.4%
Foreign born	331	0.9%
Naturalized citizen	5,321	15.2%
Not a US citizen	4,054	76.2%

Ancestry

Ancestry	Count	%
Italian	3,249	9.3%
Arab	2,824	8.1%
French	2,446	7%
Dutch	192	0.5%

Ancestry	Count	%
Polish	109	0.3%
Irish	107	0.3%
English	86	0.2%
Norwegian	67	0.2%

Technology access

Metric	% of households
Computer access	39.2%
Internet access	95.6%

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

Frequently asked questions about ZIP code 21136

What city is ZIP code 21136 in?

ZIP code 21136 is primarily assigned to Reisterstown, Maryland.

What county is ZIP code 21136 in?

ZIP code 21136 falls within Baltimore County, Maryland.

How educated is the population of ZIP code 21136?

52% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the typical home value in ZIP code 21136?

The median home value in ZIP code 21136 is $375,400.

What is the median household income in ZIP code 21136?

The median household income in ZIP code 21136 is $105,300, above the national median of ~$75,000.

What is the population of ZIP code 21136?

ZIP code 21136 has an estimated population of 35,038 residents, with a density of 623 people per square mile.

What timezone is ZIP code 21136 in?

ZIP code 21136 observes the EST timezone.