20678 ZIP Code — Prince Frederick, MD
Calvert County, Maryland
ZIP code 20678 is located in Prince Frederick, Maryland, within Calvert County. It covers approximately 44.87 square miles and serves a population of 12,874 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410.
About ZIP code 20678
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $397,200. Owner-occupancy is high at 79%, well above the national average.
Median household income is $115,710.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. An above-average commute of 41 minutes suggests many residents work outside the immediate area.
Educational attainment is near the national average, with 29% of residents holding a bachelor's degree or higher.
12,874
population
44.87
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
20678 ZIP code map
Cities in ZIP code 20678
Below are the cities the US Postal Service accepts for ZIP code 20678. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Prince Frederick | Acceptable |
| Prince Frederick | Preferred |
Nearby ZIP codes
20676 Port Republic (2.9 mi)
20685 Saint Leonard (6.2 mi)
20615 Broomes Island (7 mi)
20639 Huntingtown (7 mi)
20608 Aquasco (8.1 mi)
20659 Mechanicsville (8.1 mi)
20637 Hughesville (10.4 mi)
20689 Sunderland (10.7 mi)
20732 Chesapeake Beach (10.9 mi)
20636 Hollywood (11 mi)
20656 Loveville (11.4 mi)
20657 Lusby (12.2 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 12,874 |
| Population density | 287 / sq mi |
| State FIPS | 24 |
| County FIPS | 009 |
| Geography | |
|---|---|
| Land area | 44.87 sq mi |
| Water area | 9.11 sq mi |
| Latitude | 38.5088 |
| Longitude | -76.5956 |
| 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 | 30.0% | 17.9% | 28.2% |
| $50k – $100k | 21.2% | 25.0% | 28.2% |
| $100k – $200k | 33.7% | 39.4% | 30.1% |
| Over $200k | 15.0% | 17.7% | 13.4% |
Demographics & statistics
12,874
Population
287
People per sq mi
38.5
Median age
$115,710
Median household income
$49,562
Per capita income
$397,200
Median home value
$1,163
Median monthly rent
78.9%
Home ownership
9.1%
Poverty rate
3.5%
Unemployment
4,018
Housing units
29.4%
Bachelor's or higher
Age distribution
Male
Female
408
Under 5
434
306
5–9
326
399
10–14
423
388
15–19
413
535
20–24
569
766
25–34
813
932
35–44
991
795
45–54
845
440
55–59
468
275
60–64
292
610
65–74
649
289
75–84
307
97
85+
104
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 2,719 | 21.1% |
| 18 and over | 10,155 | 78.9% |
| 65 and over | 2,056 | 16.0% |
| Median age | 38.5 years | |
Race & ethnicity
White
68.7%
Black or African American
16.1%
Two or more races
6.8%
Hispanic or Latino
4.5%
Asian
2.2%
Other race
1.5%
American Indian / Alaska Native
0.2%
| Group | Count | % |
|---|---|---|
| White | 9,262 | 68.7% |
| Black or African American | 2,167 | 16.1% |
| Two or more races | 922 | 6.8% |
| Hispanic or Latino | 613 | 4.5% |
| Asian | 298 | 2.2% |
| Other race | 203 | 1.5% |
| American Indian / Alaska Native | 22 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 30.0% | 17.9% | 28.2% |
| $50k – $100k | 21.2% | 25.0% | 28.2% |
| $100k – $200k | 33.7% | 39.4% | 30.1% |
| Over $200k | 15.0% | 17.7% | 13.4% |
Under $10k
3.4%
$10k–$15k
4.4%
$15k–$25k
4.9%
$25k–$35k
4.6%
$35k–$50k
5.9%
$50k–$75k
9.6%
$75k–$100k
11.0%
$100k–$150k
20.5%
$150k–$200k
12.9%
$200k+
22.7%
| Range | % of households |
|---|---|
| Under $10k | 3.4% |
| $10k–$15k | 4.4% |
| $15k–$25k | 4.9% |
| $25k–$35k | 4.6% |
| $35k–$50k | 5.9% |
| $50k–$75k | 9.6% |
| $75k–$100k | 11.0% |
| $100k–$150k | 20.5% |
| $150k–$200k | 12.9% |
| $200k+ | 22.7% |
| Median income | $115,710 |
Housing
Home values
Under $50k
1.9%
$50k–$100k
0.5%
$100k–$150k
0.3%
$150k–$200k
3.2%
$200k–$300k
16.2%
$300k–$500k
49.2%
$500k–$1M
26.3%
$1M+
2.5%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $397,200 |
| Median rent / month | $1,163 |
| Owner occupied | 78.9% |
| Renter occupied | 21.1% |
| Vacant | 6.2% |
| Single-family detached | 77.0% |
| Large apartment buildings | 6.9% |
| Mobile homes | 0.1% |
| Median rooms | 6.4 |
| Avg household size (owned) | 2.80 |
Year built
| Era | % |
|---|---|
| 2020 or later | 2.3% |
| 2010–2019 | 15.5% |
| 2000–2009 | 19.9% |
| 1990–1999 | 15.0% |
| 1980–1989 | 11.4% |
| 1970–1979 | 15.2% |
| 1960–1969 | 6.3% |
| 1950–1959 | 4.3% |
| 1940–1949 | 3.1% |
| 1939 or earlier | 6.9% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.2% |
| 1 bedroom | 6.0% |
| 2 bedrooms | 15.6% |
| 3 bedrooms | 39.8% |
| 4 bedrooms | 27.1% |
| 5+ bedrooms | 11.2% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 5.6% |
| 1 vehicle | 22.9% |
| 2 vehicles | 32.4% |
| 3 or more | 39.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 12.4% |
| Electricity | 58.1% |
| Propane / LP gas | 7.7% |
| Fuel oil | 13.1% |
| Wood | 7.9% |
| Solar | 0.3% |
| No fuel used | 0.2% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 2,463 | 52.4% |
| Cohabiting couple | 201 | 4.3% |
| Male householder, no spouse | 793 | 16.9% |
| Female householder, no spouse | 1,240 | 26.4% |
| Households with children under 18 | 1,622 | 34.5% |
| Households with seniors (65+) | 1,443 | 30.7% |
| Average household size | 2.67 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 38.4% | 30.6% |
| Married | 53.9% | 48.2% |
| Separated | 0.4% | 1.2% |
| Widowed | 1.8% | 9.1% |
| Divorced | 5.6% | 10.9% |
Education
Less than 9th grade
2.0%
Some HS, no diploma
6.5%
HS graduate
29.6%
Some college, no degree
22.6%
Associate's degree
9.9%
Bachelor's degree
17.0%
Graduate / professional
12.3%
| Metric | % |
|---|---|
| HS diploma or higher | 91.5% |
| Bachelor's or higher | 29.4% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 242 | 8.6% |
| Kindergarten | 99 | 3.5% |
| Elementary school | 1,068 | 37.8% |
| High school | 604 | 21.4% |
| College / grad school | 809 | 28.7% |
Employment
Industry of employment
Education & healthcare
18.1%
Construction
16.6%
Public administration
16.5%
Arts, food & hospitality
8.8%
Professional & management
8.3%
Transportation & utilities
7.6%
Retail trade
5.7%
Other services
5.5%
Finance & real estate
5.1%
Manufacturing
3.4%
Wholesale trade
2.0%
Agriculture & mining
1.7%
Information
0.8%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 37.7% |
| Service | 18.6% |
| Sales & office | 23.2% |
| Natural resources & construction | 14.2% |
| Production & transportation | 6.2% |
Employment type
| Type | % |
|---|---|
| Private sector | 65.6% |
| Government | 27.4% |
| Self-employed | 6.4% |
| Unpaid family workers | 0.6% |
Commute
| Method | % |
|---|---|
| Drive alone | 77.4% |
| Carpool | 6.9% |
| Public transit | 0.6% |
| Walk | 1.1% |
| Work from home | 11.9% |
| Other means | 2.1% |
| Avg commute (minutes) | 41.2 |
Poverty
All people
9.1%
Under 18 years
11.6%
18 and over
8.4%
Married-couple families
2.4%
Female-led households
14.9%
Income support
| Source | % of households |
|---|---|
| Social Security | 29.9% |
| Retirement income | 30.7% |
| Supplemental Security | 6.3% |
| Cash public assistance | 2.4% |
| Food stamps / SNAP | 10.4% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 36.4% |
| High blood pressure | 33.5% |
| High cholesterol | 33.3% |
| Diabetes | 10.0% |
| Heart disease | 5.2% |
| Stroke | 2.8% |
| Asthma | 10.3% |
| Arthritis | 26.7% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.9% |
| Cancer | 6.5% |
| Behavior / access | % |
|---|---|
| Smoking | 15.9% |
| Binge drinking | 15.2% |
| No physical activity | 21.1% |
| Less than 7 hrs sleep | 37.1% |
| Depression | 18.8% |
| Fair or poor health | 11.9% |
| Poor mental health | 14.4% |
| Poor physical health | 8.3% |
| No health insurance | 10.3% |
| Visited doctor (checkup) | 75.8% |
| Visited dentist | 67.6% |
| Cholesterol screening | 91.8% |
| Teeth loss | 11.2% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 823 | 8.2% |
| Disability | % |
|---|---|
| Any disability | 9.7% |
| Under 18 | 2.9% |
| 18–64 years | 6.8% |
| 65 and over | 31.1% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 81.6% |
| Public insurance | 28.6% |
| No insurance | 2.5% |
| Uninsured under 19 | 1.8% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 12,032 | 93.5% |
| Spanish | 198 | 1.6% |
| Other Indo-European | 63 | 0.5% |
| Asian & Pacific Islander | 26 | 0.2% |
| Other languages | 109 | 0.9% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 12,184 | 94.6% |
| Born in same state | 11,867 | 92.2% |
| Born in different state | 7,353 | 57.1% |
| Foreign born | 317 | 2.5% |
| Naturalized citizen | 690 | 5.4% |
| Not a US citizen | 533 | 77.2% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 1,926 | 15% |
| Italian | 1,773 | 13.8% |
| Arab | 325 | 2.5% |
| English | 100 | 0.8% |
| Polish | 82 | 0.6% |
| Ancestry | Count | % |
|---|---|---|
| Irish | 62 | 0.5% |
| German | 49 | 0.4% |
| Norwegian | 14 | 0.1% |
| Dutch | 6 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 36.5% |
| Internet access | 94.9% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 20678
What city is ZIP code 20678 in?
ZIP code 20678 is primarily assigned to Prince Frederick, Maryland.
What county is ZIP code 20678 in?
ZIP code 20678 falls within Calvert County, Maryland.
What is the typical home value in ZIP code 20678?
The median home value in ZIP code 20678 is $397,200.
What is the median household income in ZIP code 20678?
The median household income in ZIP code 20678 is $115,710, above the national median of ~$75,000.
What is the population of ZIP code 20678?
ZIP code 20678 has an estimated population of 12,874 residents, with a density of 287 people per square mile.
What timezone is ZIP code 20678 in?
ZIP code 20678 observes the EST timezone.