Keymar ZIP Codes — Carroll County, MD

There is one unique ZIP code in Keymar, Maryland and it is 21757. Area code: 443/410/667.
1
ZIP codes
35.17
sq mi land
0.09
sq mi water
443/410/667
area code
Keymar, MD ZIP code map

About Keymar, MD

Keymar, Maryland, is a charming small community nestled in Carroll County. With a close-knit atmosphere, it offers a peaceful retreat from the hustle and bustle of bigger cities. Residents enjoy the scenic landscapes and the local charm of this quaint town.

Location & geography

Keymar is situated in the north-central part of Maryland, just a short drive from major highways and key locations. The nearest cities include Taneytown, located approximately 6 miles to the southwest, Westminster about 14 miles to the east, and Gettysburg, Pennsylvania, around 17 miles to the north. The town covers a total land area of 35.17 square miles, with a modest water area of 0.09 square miles.

Community & economy

The community in Keymar is characterized by its rural atmosphere and friendly residents, creating a welcoming environment for families and visitors alike. Industries in the area primarily focus on agriculture, local businesses, and services catering to residents. Daily life in Keymar reflects a slower pace, with opportunities for outdoor activities and community events.

Transportation

Keymar is accessible via several major highways, including Maryland Route 140, which connects it to nearby towns and cities. The nearest major airport is the Baltimore/Washington International Airport, located approximately 50 miles to the southeast, providing access for both business and leisure travelers. Public transportation options are limited, emphasizing the town's small-town charm.

History

Keymar was established in the 19th century and has been shaped by its agricultural roots throughout its history. The town has seen development centered around farming and local commerce, contributing to its character as a quaint rural community. Although it may not be widely known, Keymar's history reflects the broader narrative of rural Maryland.

Did you know?

A little-known fact about Keymar is that it is home to several local farms that contribute to agricultural education programs. The town’s landscape is dotted with picturesque views of farmland and rolling hills, which are not only beautiful but vital to its local economy.

ZIP codes for Keymar, MD (1)
ZIP code City County Map
21757 Keymar Carroll View map

Demographics & statistics

2,722
Population
46.4
Median age
$96,250
Median household income
$44,296
Per capita income
$425,000
Median home value
$1,331
Median monthly rent
75.9%
Home ownership
2.7%
Poverty rate
3.8%
Unemployment
867
Housing units
29.9%
Bachelor's or higher

Age distribution

Male Female
83
Under 5
68
87
5–9
71
94
10–14
77
70
15–19
56
99
20–24
80
156
25–34
126
145
35–44
117
213
45–54
172
156
55–59
127
92
60–64
74
168
65–74
137
126
75–84
103
14
85+
11
← Male
Female →

Age summary

GroupCount%
Under 1851819.0%
18 and over2,20481.0%
65 and over55920.5%
Median age46.4 years

Race & ethnicity

White 91.9%
Two or more races 2.2%
Black or African American 1.9%
Asian 1.6%
American Indian / Alaska Native 1.3%
Hispanic or Latino 1.1%
GroupCount%
White2,53091.9%
Two or more races602.2%
Black or African American531.9%
Asian431.6%
American Indian / Alaska Native361.3%
Hispanic or Latino311.1%

Household income

Under $10k 3.0%
$15k–$25k 1.4%
$25k–$35k 2.5%
$35k–$50k 8.9%
$50k–$75k 20.7%
$75k–$100k 15.2%
$100k–$150k 27.4%
$150k–$200k 10.8%
$200k+ 10.2%
Range% of households
Under $10k3.0%
$15k–$25k1.4%
$25k–$35k2.5%
$35k–$50k8.9%
$50k–$75k20.7%
$75k–$100k15.2%
$100k–$150k27.4%
$150k–$200k10.8%
$200k+10.2%
Median income$96,250

Housing

Home values

Under $50k 1.6%
$100k–$150k 1.6%
$150k–$200k 5.2%
$200k–$300k 17.5%
$300k–$500k 36.4%
$500k–$1M 21.3%
$1M+ 16.5%

Housing overview

MetricValue
Median home value$425,000
Median rent / month$1,331
Owner occupied75.9%
Renter occupied24.1%
Vacant6.4%
Single-family detached92.6%
Large apartment buildings2.2%
Mobile homes2.4%
Median rooms7.2
Avg household size (owned)2.51

Year built

Era%
2020 or later0.0%
2010–20193.9%
2000–200911.6%
1990–199912.9%
1980–198910.2%
1970–19799.6%
1960–19698.7%
1950–19592.8%
1940–19495.8%
1939 or earlier34.6%

Bedrooms

Size% of units
No bedroom (studio)0.5%
1 bedroom1.3%
2 bedrooms17.9%
3 bedrooms46.2%
4 bedrooms24.8%
5+ bedrooms9.3%

Vehicles per household

Vehicles% of households
No vehicle1.6%
1 vehicle14.2%
2 vehicles32.0%
3 or more52.2%

Heating fuel

Fuel type%
Utility gas1.5%
Electricity52.2%
Propane / LP gas10.6%
Fuel oil24.5%
Wood9.0%
Solar1.8%
No fuel used0.4%

Households & families

Household typeCount%
Married-couple family61458.6%
Cohabiting couple393.7%
Male householder, no spouse19418.5%
Female householder, no spouse20119.2%
Households with children under 1822021.0%
Households with seniors (65+)41239.3%
Average household size2.57

Marital status

StatusMaleFemale
Never married27.5%29.4%
Married57.6%57.0%
Separated2.6%2.3%
Widowed2.2%7.3%
Divorced10.0%4.0%

Education

Less than 9th grade 5.7%
Some HS, no diploma 5.0%
HS graduate 37.2%
Some college, no degree 16.5%
Associate's degree 5.7%
Bachelor's degree 15.8%
Graduate / professional 14.0%
Metric%
HS diploma or higher89.3%
Bachelor's or higher29.9%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool00.0%
Kindergarten71.2%
Elementary school32356.2%
High school6912.0%
College / grad school17630.6%

Employment

Industry of employment

Education & healthcare 20.4%
Construction 17.4%
Professional & management 10.6%
Retail trade 9.9%
Agriculture & mining 7.8%
Manufacturing 7.3%
Public administration 6.7%
Transportation & utilities 5.4%
Other services 5.0%
Finance & real estate 4.8%
Arts, food & hospitality 3.7%
Wholesale trade 0.5%
Information 0.5%

Occupation

Category%
Management, business & arts37.0%
Service10.1%
Sales & office24.6%
Natural resources & construction18.6%
Production & transportation9.6%

Employment type

Type%
Private sector72.3%
Government17.1%
Self-employed8.4%
Unpaid family workers2.2%

Commute

Method%
Drive alone73.1%
Carpool6.6%
Public transit0.0%
Walk4.1%
Other means2.0%
Avg commute (minutes)35.5

Poverty

All people 2.7%
Under 18 years 0.0%
18 and over 3.3%
Married-couple families 1.0%
Female-led households 0.0%

Income support

Source% of households
Social Security39.1%
Retirement income28.4%
Supplemental Security0.9%
Cash public assistance1.3%
Food stamps / SNAP6.3%

Health indicators

Condition%
High blood pressure34.2%
High cholesterol36.8%
Heart disease6.3%
Stroke2.9%
Asthma9.7%
Arthritis26.0%
Kidney disease2.8%
Pulmonary disease6.9%
Cancer7.2%
Behavior / access%
Binge drinking16.3%
No physical activity21.7%
Less than 7 hrs sleep30.1%
Fair or poor health12.5%
Poor mental health14.3%
Poor physical health9.3%
No health insurance10.2%
Visited doctor (checkup)76.0%
Visited dentist65.6%
Cholesterol screening91.7%
Teeth loss11.4%

Veterans & disability

VeteransCount%
Civilian veterans1064.8%
Disability%
Any disability13.1%
Under 184.3%
18–64 years11.3%
65 and over26.3%

Health insurance coverage

Type%
Private insurance84.8%
Public insurance32.6%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only2,57194.5%
Spanish471.8%
Other Indo-European210.8%
Asian & Pacific Islander261.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)2,63196.7%
Born in same state2,58194.8%
Born in different state1,63760.1%
Foreign born501.8%
Naturalized citizen913.3%
Not a US citizen7481.3%

Ancestry

AncestryCount%
Arab38414.1%
French31311.5%
Italian2047.5%
AncestryCount%
Polish220.8%
English70.3%

Technology access

Metric% of households
Computer access38.5%
Internet access93.4%

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

Frequently asked questions
What ZIP codes does Keymar, MD have?
Keymar, MD has one ZIP code: 21757. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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