ZIP Code 21639, Maryland

ZCTA5 21639 is a 5-digit ZIP Code area located in Caroline County, Maryland. As of official census estimates, it has a reported population of 4,682. The land area covers 33.09 sq mi. ^[1]

Demographics & Population

Demographic Metric	Estimate / Count	Margin of Error	Survey Period / Source
Total Population	4,682	±528	2020-2024 / Census ACS 5-Year 2024
Median Age	37.7 yrs	±3.7	2020-2024 / Census ACS 5-Year 2024
Total Households	1,743	±192	2020-2024 / Census ACS 5-Year 2024

Source: U.S. Census Bureau (PEP, ACS 5-Year).

Housing & Real Estate Profile

Housing Metric	Estimate / Value	Margin of Error
Total Housing Units	1,916	±188
Occupied Housing Units	1,743	±192
Vacant Housing Units	173	±123
Median Home Value	$269,400	±$21,930
Median Gross Rent	$1,107	±$71

Source: U.S. Census Bureau ACS 5-Year (2020-2024).

Economy & Workforce

Economic Metric	Estimate / Value	Margin of Error
Median Household Income	$62,772	±$19,053
Per Capita Income	$33,990	±$3,900
Poverty Rate	10.3%	±5.5%
Population Below Poverty Level	481	±265
Unemployment Rate	2.1%	±1.4%
Civilian Labor Force, Employed	2,238	±327
Broadband Internet Rate	87%	±6.1%

Source: U.S. Census Bureau ACS 5-Year (2020-2024).

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF CAROLINE GUS Population: 34,248 (2024) ID: 204619	County	Official County Government	Contact: EXECUTIVE ASSISTANT 109 MARKET ST, RM 123, DENTON MD 21629-1055

Education

Listing 10 local institutions (NCES 2024-2025) External reference via K12Guides

Institution	Type	Grades	Location
Academy Of Dover Charter School	Regular School Nearby	KG-08	Dover, DE
Allen Frear Elementary School	Regular School Nearby	01-05	Camden, DE
Booker T. Washington Elementary School	Regular School Nearby	KG-04	Dover, DE
Caesar Rodney High School	Regular School Nearby	09-12	Camden, DE
Campus Community School	Regular School Nearby	KG-08	Dover, DE
Capital Early Childhood Center	Regular School Nearby	PK	Dover, DE
Caroline Career & Technology Center	Career and Technical School Nearby	09-12	Ridgely, MD
Centreville Middle School	Regular School Nearby	06-08	Centreville, MD
Chapel District Elementary	Regular School Nearby	PK-05	Cordova, MD
Chipman (W.T.) Middle School	Regular School Nearby	06-08	Harrington, DE

Source: k12guides.com.

Community Facilities & Infrastructure

Displaying 10 civic institutions across 2 datasets queried CMS • IPEDS • IMLS

Facility Name	Category	Relationship	Address / Location	Contact
Polytech Adult Education	College Vocational	14.9 mi away	823 Walnut Shade Road, Woodside, DE, 19980-0000	3026974545 Website →
NORTH COUNTY BRANCH	Library	1.7 mi away	101 CEDAR LANE, GREENSBORO, MD, 21639	(410) 482-2173
Chesapeake College	College	16.2 mi away	1000 College Circle, Wye Mills, MD, 21679-0008	4108225400 Website →
CAROLINE CENTRAL LIBRARY	Library	5.7 mi away	100 MARKET ST., DENTON, MD, 21629	(410) 479-1343
Delaware Technical Community College-Terry	College	20.4 mi away	100 Campus Drive, Dover, DE, 19901	3028571000 Website →
HARRINGTON PUBLIC LIBRARY	Library	11.3 mi away	110 CENTER STREET, HARRINGTON, DE, 19952	(302) 398-4647
Delaware State University	College	20.4 mi away	1200 N. Dupont Highway, Dover, DE, 19901	3028576060 Website →
GREENWOOD PUBLIC LIBRARY	Library	14.7 mi away	100 MILL STREET, GREENWOOD, DE, 19950	(302) 855-1242
Delaware Technical Community College-Central Office	College	20.6 mi away	1832 North Dupont Highway, Dover, DE, 19901	3027393737 Website →
KENT COUNTY BOOKMOBILE	Library	15.0 mi away	497 SOUTH RED HAVEN LANE, DOVER, DE, 19901	(302) 744-1919

Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.

Climate & Weather Observations

NOAA Monthly Climate Normals

Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at GREENWOOD 2NE, DE US, located 14.8 miles from ZCTA5 21639. Local microclimates, topography, and elevation may cause municipal conditions to differ.

Month	High (°F)	Low (°F)	Mean (°F)	Precip (in)	Snow (in)
January	43.6°	25.4°	34.5°	3.61"	3.3"
February	45.7°	26.3°	36.0°	2.91"	5.9"
March	53.9°	32.9°	43.4°	4.01"	1.6"
April	64.7°	42.4°	53.5°	3.44"	0.2"
May	73.3°	51.9°	62.6°	3.67"	0.0"
June	82.1°	61.6°	71.9°	4.19"	0.0"
July	86.7°	66.7°	76.7°	4.01"	0.0"
August	85.0°	64.7°	74.9°	4.50"	0.0"
September	78.9°	57.9°	68.4°	4.77"	0.0"
October	68.2°	46.2°	57.2°	4.23"	0.0"
November	57.3°	37.2°	47.2°	3.19"	0.0"
December	48.2°	29.3°	38.8°	3.78"	1.8"

Source: NOAA U.S. Climate Normals (1991–2020).

Local Weather Forecast

Weather forecast data is currently unavailable in the local cache.

Nearby Cities & Communities

Listing adjacent communities by spatial proximity (miles) Proximity discovery

Community Name	Classification	Distance	Population
Greensboro town	Town	1.8 mi	—
Goldsboro town	Town	4.9 mi	—
Ridgely town	Town	5.4 mi	—
West Denton CDP	CDP	5.7 mi	—
Denton town	Town	5.9 mi	—
Henderson town	Town	8.1 mi	—

Sources & Data Provenance

1. Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 21639. • Official Source Dataset →
2. Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
3. Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
4. Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.

Read complete data sources, methodology, and licensing documentation →