Conowingo ZIP Codes — Cecil County, MD

There is one unique ZIP code in Conowingo, Maryland and it is 21918. Area code: 410.
1
ZIP codes
17.57
sq mi land
2.55
sq mi water
410
area code
Conowingo, MD ZIP code map

About Conowingo, MD

Conowingo, Maryland is a quaint community located in Cecil County. This charming town offers a blend of rural and suburban living, making it an appealing place for residents and visitors alike. Known for its scenic beauty, Conowingo is situated near the Susquehanna River, adding to its natural allure.

Location & geography

Conowingo is located in the northeastern part of Maryland, nestled alongside the Susquehanna River. It is approximately 6 miles northeast of the larger town of Rising Sun and about 15 miles south of the city of Lancaster, Pennsylvania. The town spans a land area of 17.57 square miles, with an additional 2.55 square miles of water, providing residents with a mix of lush landscapes and waterways.

Community & economy

The community of Conowingo is characterized by its friendly, small-town atmosphere, where residents often engage in local events and activities. The primary industries in the area include agriculture and tourism, with visitors drawn to the nearby Conowingo Dam for its fishing and recreational opportunities. Daily life in Conowingo reflects a peaceful pace, where community members prioritize a sense of belonging and neighborly support.

Transportation

Conowingo is served by major routes including U.S. Route 1 and Maryland Route 222, facilitating easy travel to and from surrounding areas. The nearest airport is the Greater Wilmington Airport, located about 30 miles to the southeast, providing residents with convenient access to air travel. Public transportation options are limited, making personal vehicles the primary mode of transit for most residents.

History

Conowingo was founded in the early 19th century and has historical significance built around its agriculture and the nearby Conowingo Dam. The dam, completed in 1928, played a crucial role in supplying hydroelectric power and has influenced local industry and tourism. Notable events in Conowingo's history include the annual gatherings at the dam, where the public can enjoy fishing, hiking, and wildlife observation, showcasing the area's natural beauty.

Did you know?

One surprising fact about Conowingo is that it hosts the Conowingo Festival every fall, celebrating local culture and heritage with various activities. Additionally, the Conowingo Dam is a popular spot for bald eagle sightings, particularly in the winter months, attracting nature enthusiasts from all over.

ZIP codes for Conowingo, MD (1)
ZIP code City County Map
21918 Conowingo Cecil View map

Demographics & statistics

4,462
Population
42.7
Median age
$78,691
Median household income
$38,461
Per capita income
$295,700
Median home value
$953
Median monthly rent
88.8%
Home ownership
6.2%
Poverty rate
3.9%
Unemployment
1,571
Housing units
16.3%
Bachelor's or higher

Age distribution

Male Female
126
Under 5
124
155
5–9
153
157
10–14
154
110
15–19
108
95
20–24
94
185
25–34
182
365
35–44
360
290
45–54
286
187
55–59
184
189
60–64
186
219
65–74
216
127
75–84
126
42
85+
42
← Male
Female →

Age summary

GroupCount%
Under 1899122.2%
18 and over3,47177.8%
65 and over77217.3%
Median age42.7 years

Race & ethnicity

White 87%
Two or more races 6.5%
Hispanic or Latino 3.4%
Black or African American 2.2%
American Indian / Alaska Native 0.5%
Asian 0.3%
Other race 0.2%
GroupCount%
White4,01887%
Two or more races3026.5%
Hispanic or Latino1563.4%
Black or African American1002.2%
American Indian / Alaska Native210.5%
Asian120.3%
Other race90.2%

Household income

Under $10k 1.0%
$10k–$15k 4.0%
$15k–$25k 5.3%
$25k–$35k 2.8%
$35k–$50k 13.1%
$50k–$75k 20.6%
$75k–$100k 11.8%
$100k–$150k 21.3%
$150k–$200k 7.9%
$200k+ 12.2%
Range% of households
Under $10k1.0%
$10k–$15k4.0%
$15k–$25k5.3%
$25k–$35k2.8%
$35k–$50k13.1%
$50k–$75k20.6%
$75k–$100k11.8%
$100k–$150k21.3%
$150k–$200k7.9%
$200k+12.2%
Median income$78,691

Housing

Home values

Under $50k 6.2%
$50k–$100k 3.0%
$100k–$150k 3.9%
$150k–$200k 10.0%
$200k–$300k 28.5%
$300k–$500k 40.9%
$500k–$1M 7.4%

Housing overview

MetricValue
Median home value$295,700
Median rent / month$953
Owner occupied88.8%
Renter occupied11.2%
Vacant4.2%
Single-family detached84.4%
Large apartment buildings0.0%
Mobile homes13.0%
Median rooms7.1
Avg household size (owned)2.66

Year built

Era%
2020 or later0.6%
2010–20197.7%
2000–200913.4%
1990–199924.9%
1980–198921.1%
1970–19795.7%
1960–19697.3%
1950–19594.4%
1940–19491.6%
1939 or earlier13.2%

Bedrooms

Size% of units
No bedroom (studio)1.9%
1 bedroom3.1%
2 bedrooms19.8%
3 bedrooms45.5%
4 bedrooms26.9%
5+ bedrooms2.8%

Vehicles per household

Vehicles% of households
No vehicle1.7%
1 vehicle27.9%
2 vehicles33.9%
3 or more36.5%

Heating fuel

Fuel type%
Utility gas5.7%
Electricity38.3%
Propane / LP gas25.0%
Fuel oil19.1%
Wood9.7%
No fuel used1.8%

Households & families

Household typeCount%
Married-couple family1,15068.2%
Cohabiting couple875.2%
Male householder, no spouse18711.1%
Female householder, no spouse26115.5%
Households with children under 1849629.4%
Households with seniors (65+)53231.6%
Average household size2.64

Marital status

StatusMaleFemale
Never married19.4%22.2%
Married68.7%61.7%
Separated0.0%0.9%
Widowed0.0%7.7%
Divorced12.0%7.6%

Education

Less than 9th grade 0.9%
Some HS, no diploma 6.2%
HS graduate 40.9%
Some college, no degree 23.7%
Associate's degree 12.1%
Bachelor's degree 7.5%
Graduate / professional 8.9%
Metric%
HS diploma or higher92.9%
Bachelor's or higher16.3%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool11011.4%
Kindergarten747.7%
Elementary school50852.6%
High school18919.6%
College / grad school858.8%

Employment

Industry of employment

Public administration 18.5%
Education & healthcare 18.0%
Construction 16.8%
Manufacturing 9.8%
Professional & management 9.7%
Retail trade 9.2%
Transportation & utilities 5.5%
Arts, food & hospitality 4.2%
Finance & real estate 3.5%
Information 2.3%
Wholesale trade 1.5%
Agriculture & mining 0.6%
Other services 0.5%

Occupation

Category%
Management, business & arts38.3%
Service15.2%
Sales & office15.2%
Natural resources & construction15.1%
Production & transportation16.2%

Employment type

Type%
Private sector67.0%
Government28.7%
Self-employed3.2%
Unpaid family workers1.1%

Commute

Method%
Drive alone80.0%
Carpool7.4%
Public transit0.0%
Walk1.0%
Other means0.0%
Avg commute (minutes)36.3

Poverty

All people 6.2%
Under 18 years 0.9%
18 and over 7.7%
Married-couple families 1.4%
Female-led households 52.6%

Income support

Source% of households
Social Security36.6%
Retirement income30.9%
Supplemental Security4.2%
Cash public assistance1.4%
Food stamps / SNAP7.0%

Health indicators

Condition%
High blood pressure35.1%
High cholesterol34.2%
Heart disease5.5%
Stroke2.6%
Asthma9.4%
Arthritis25.3%
Kidney disease2.4%
Pulmonary disease6.5%
Cancer6.4%
Behavior / access%
Binge drinking17.6%
No physical activity23.9%
Less than 7 hrs sleep35.6%
Fair or poor health12.3%
Poor mental health14.9%
Poor physical health9.1%
No health insurance10.0%
Visited doctor (checkup)73.1%
Visited dentist64.3%
Cholesterol screening91.0%
Teeth loss11.7%

Veterans & disability

VeteransCount%
Civilian veterans3028.7%
Disability%
Any disability14.8%
Under 182.0%
18–64 years13.9%
65 and over34.5%

Health insurance coverage

Type%
Private insurance75.0%
Public insurance36.5%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only4,21294.4%
Spanish651.5%
Other Indo-European210.5%
Asian & Pacific Islander441.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)4,41398.9%
Born in same state4,40598.7%
Born in different state2,87164.3%
Foreign born80.2%
Naturalized citizen491.1%
Not a US citizen3877.6%

Ancestry

AncestryCount%
French48710.9%
Italian47810.7%
Arab4219.4%
Polish551.2%
AncestryCount%
English290.6%
Irish170.4%
German110.2%
Norwegian110.2%

Technology access

Metric% of households
Computer access37.8%
Internet access93.4%

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

Frequently asked questions
What ZIP codes does Conowingo, MD have?
Conowingo, MD has one ZIP code: 21918. Each ZIP code serves a distinct delivery area within the city and surrounding region.
Need the complete Maryland ZIP code database? Download all MD ZIP codes — Excel, CSV, or Access. Includes lat/lng, county FIPS & timezone.
Download database →