ZIP Code 20678, Maryland
ZIP Code 20678 profile, demographic data, and geographic information.
ZCTA5 20678 is a 5-digit ZIP Code area located in Calvert County, Maryland. As of official census estimates, it has a reported population of 12,752. The land area covers 44.87 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population | 12,752 | ±926 | 2020-2024 / Census ACS 5-Year 2024 |
| Median Age | 38.4 yrs | ±1.9 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 4,858 | ±376 | 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 | 5,183 | ±382 |
| Occupied Housing Units | 4,858 | ±376 |
| Vacant Housing Units | 325 | ±160 |
| Median Home Value | $455,100 | ±$25,874 |
| Median Gross Rent | $1,388 | ±$168 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $125,732 | ±$12,236 |
| Per Capita Income | $54,751 | ±$4,035 |
| Poverty Rate | 7.5% | ±2.3% |
| Population Below Poverty Level | 939 | ±299 |
| Unemployment Rate | 2.5% | ±1.1% |
| Civilian Labor Force, Employed | 6,919 | ±708 |
| Broadband Internet Rate | 91.6% | ±2.8% |
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 |
|---|---|---|---|
|
GUS Population: 94,913 (2024)
ID: 105976
|
County | Official County Government |
Contact: COUNTY ADMINISTRATOR
175 MAIN ST, PRINCE FREDERICK MD 20678-9302
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | PK-05 | Brandywine, MD | |
| Regular School Nearby | PK-05 | Prince Frederick, MD | |
| Regular School Nearby | PK-05 | Chesapeake Beach, MD | |
| Regular School Nearby | PK-05 | Loveville, MD | |
| Regular School Nearby | KG-05 | Brandywine, MD | |
| Special Education School Nearby | PK-12 | Prince Frederick, MD | |
| Alternative School Nearby | 06-12 | Prince Frederick, MD | |
| Regular School Nearby | PK-05 | Prince Frederick, MD | |
| Regular School Nearby | 09-12 | Prince Frederick, MD | |
| Regular School Nearby | 06-08 | Prince Frederick, MD |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
College of Southern Maryland
|
College | 22.5 mi away | 8730 Mitchell Rd, La Plata, MD, 20646-0910 |
3019342251
|
|
CALVERT LIBRARY PRINCE FREDERICK
|
Library | 2.2 mi away | 850 COSTLEY WAY, PRINCE FREDERICK, MD, 20678 |
(410) 535-0291
|
|
St. Mary's College of Maryland
|
College | 24.9 mi away | 47645 College Drive, St. Mary's City, MD, 20686 |
2408952000
|
|
CALVERT MOBILE SERVICES
|
Library | 2.2 mi away | 850 COSTLEY WAY, PRINCE FREDERICK, MD, 20678 |
(410) 535-0291
|
|
CHARLOTTE HALL BRANCH
|
Library | 10.4 mi away | 37600 NEW MARKET ROAD, CHARLOTTE HALL, MD, 20622 |
(301) 884-2211
|
|
FAIRVIEW BRANCH
|
Library | 11.8 mi away | 8120 SOUTHERN MARYLAND BOULEVARD, OWINGS, MD, 20736 |
(410) 257-2101
|
|
TWIN BEACHES BRANCH
|
Library | 11.8 mi away | 3819 HARBOR RD, CHESAPEAKE BEACH, MD, 20732 |
(410) 257-2411
|
|
BADEN BRANCH
|
Library | 13.3 mi away | 13603 BADEN-WESTWOOD RD., BRANDYWINE, MD, 20613 |
(301) 888-1152
|
|
SOUTHERN BRANCH
|
Library | 14.8 mi away | 13920 HG TRUEMAN RD, SOLOMONS, MD, 20688 |
(410) 326-5289
|
|
LEONARDTOWN BRANCH
|
Library | 14.8 mi away | 23630 HAYDEN FARM LN., LEONARDTOWN, MD, 20650 |
(301) 475-2846
|
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 MECHANICSVILLE 5 NE, MD US, located 7.4 miles from ZCTA5 20678. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 44.2° | 24.8° | 34.5° | 3.29" | 5.0" |
| February | 47.6° | 26.2° | 36.9° | 2.97" | 6.2" |
| March | 55.9° | 32.6° | 44.2° | 4.24" | 1.8" |
| April | 67.3° | 42.5° | 54.9° | 3.31" | 0.1" |
| May | 73.7° | 52.0° | 62.9° | 4.32" | 0.0" |
| June | 81.5° | 60.9° | 71.2° | 4.19" | 0.0" |
| July | 85.3° | 65.9° | 75.6° | 4.57" | 0.0" |
| August | 83.3° | 64.2° | 73.8° | 4.84" | 0.0" |
| September | 76.7° | 57.7° | 67.2° | 4.87" | 0.0" |
| October | 66.1° | 45.7° | 55.9° | 4.18" | 0.0" |
| November | 57.3° | 35.5° | 46.4° | 3.34" | 0.0" |
| December | 48.1° | 28.6° | 38.3° | 3.99" | 2.0" |
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 |
|---|---|---|---|
| Prince Frederick CDP | CDP | 1.4 mi | — |
| Benedict CDP | CDP | 4.6 mi | — |
| Eagle Harbor town | Town | 5.7 mi | — |
| Huntingtown CDP | CDP | 5.9 mi | — |
| Golden Beach CDP | CDP | 6.2 mi | — |
| St. Leonard CDP | CDP | 6.5 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 20678. • Official Source Dataset →
- 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.
- 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.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.