21779 ZIP Code — Rohrersville, MD
Washington County, Maryland
ZIP code 21779 is located in Rohrersville, Maryland, within Washington County. It covers approximately 9.73 square miles and serves a population of 1,731 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 301/240.
About ZIP code 21779
The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $433,300. Owner-occupancy sits near the national average at 66%.
Median household income is $111,648.
The dominant occupation class is management, business, and professional, with retail trade as the leading industry. An above-average commute of 38 minutes suggests many residents work outside the immediate area.
Educational attainment is near the national average, with 37% of residents holding a bachelor's degree or higher.
1,731
population
9.73
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
21779 ZIP code map
Cities in ZIP code 21779
Below are the cities the US Postal Service accepts for ZIP code 21779. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Rohrersville | Acceptable |
| Rohrersville | Preferred |
Nearby ZIP codes
21718 Burkittsville (2.1 mi)
21756 Keedysville (3.4 mi)
21758 Knoxville (4.3 mi)
21769 Middletown (4.6 mi)
21755 Jefferson (6.4 mi)
21782 Sharpsburg (6.6 mi)
21713 Boonsboro (7.1 mi)
21716 Brunswick (7.5 mi)
25443 Shepherdstown (8.8 mi)
20104 Dulles (9.3 mi)
20103 Dulles (9.3 mi)
21773 Myersville (9.6 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 1,731 |
| Population density | 178 / sq mi |
| State FIPS | 24 |
| County FIPS | 043 |
| Geography | |
|---|---|
| Land area | 9.73 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 39.4230 |
| Longitude | -77.6504 |
| Timezone | Eastern (ET) |
| Area code | 301/240 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 26.0% | 40.3% | 28.2% |
| $50k – $100k | 26.4% | 30.7% | 28.2% |
| $100k – $200k | 44.6% | 23.5% | 30.1% |
| Over $200k | 3.0% | 5.6% | 13.4% |
Demographics & statistics
1,731
Population
178
People per sq mi
27.8
Median age
$111,648
Median household income
$40,718
Per capita income
$433,300
Median home value
$1,179
Median monthly rent
65.7%
Home ownership
9.5%
Poverty rate
0.0%
Unemployment
386
Housing units
37.1%
Bachelor's or higher
Age distribution
Male
Female
32
Under 5
48
84
5–9
124
36
10–14
52
62
15–19
91
79
20–24
116
115
25–34
168
102
35–44
149
80
45–54
117
37
55–59
54
15
60–64
23
28
65–74
40
26
75–84
37
6
85+
10
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 458 | 26.5% |
| 18 and over | 1,273 | 73.5% |
| 65 and over | 147 | 8.5% |
| Median age | 27.8 years | |
Race & ethnicity
White
95.5%
Two or more races
3.9%
Hispanic or Latino
0.6%
| Group | Count | % |
|---|---|---|
| White | 1,663 | 95.5% |
| Two or more races | 68 | 3.9% |
| Hispanic or Latino | 11 | 0.6% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 26.0% | 40.3% | 28.2% |
| $50k – $100k | 26.4% | 30.7% | 28.2% |
| $100k – $200k | 44.6% | 23.5% | 30.1% |
| Over $200k | 3.0% | 5.6% | 13.4% |
$10k–$15k
2.7%
$15k–$25k
2.9%
$25k–$35k
3.8%
$35k–$50k
19.5%
$50k–$75k
2.5%
$75k–$100k
13.4%
$100k–$150k
23.5%
$150k–$200k
2.3%
$200k+
29.4%
| Range | % of households |
|---|---|
| $10k–$15k | 2.7% |
| $15k–$25k | 2.9% |
| $25k–$35k | 3.8% |
| $35k–$50k | 19.5% |
| $50k–$75k | 2.5% |
| $75k–$100k | 13.4% |
| $100k–$150k | 23.5% |
| $150k–$200k | 2.3% |
| $200k+ | 29.4% |
| Median income | $111,648 |
Housing
Home values
$150k–$200k
2.2%
$200k–$300k
17.9%
$300k–$500k
40.4%
$500k–$1M
39.6%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $433,300 |
| Median rent / month | $1,179 |
| Owner occupied | 65.7% |
| Renter occupied | 34.3% |
| Vacant | 3.8% |
| Single-family detached | 75.5% |
| Large apartment buildings | 0.0% |
| Mobile homes | 2.6% |
| Median rooms | 7.1 |
| Avg household size (owned) | 3.02 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 14.8% |
| 2000–2009 | 8.7% |
| 1990–1999 | 17.7% |
| 1980–1989 | 9.5% |
| 1970–1979 | 2.8% |
| 1960–1969 | 9.2% |
| 1950–1959 | 0.0% |
| 1940–1949 | 0.0% |
| 1939 or earlier | 37.3% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 0.0% |
| 1 bedroom | 0.0% |
| 2 bedrooms | 15.1% |
| 3 bedrooms | 50.2% |
| 4 bedrooms | 25.3% |
| 5+ bedrooms | 9.4% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 2.7% |
| 1 vehicle | 7.9% |
| 2 vehicles | 48.6% |
| 3 or more | 40.8% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 15.7% |
| Electricity | 57.2% |
| Propane / LP gas | 5.4% |
| Fuel oil | 11.7% |
| Wood | 9.9% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 317 | 57.2% |
| Cohabiting couple | 63 | 11.4% |
| Male householder, no spouse | 59 | 10.6% |
| Female householder, no spouse | 115 | 20.8% |
| Households with children under 18 | 231 | 41.7% |
| Households with seniors (65+) | 105 | 19.0% |
| Average household size | 3.12 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 24.7% | 45.3% |
| Married | 64.0% | 38.4% |
| Separated | 3.2% | 12.4% |
| Widowed | 8.2% | 0.0% |
| Divorced | 0.0% | 3.9% |
Education
Less than 9th grade
9.0%
Some HS, no diploma
1.6%
HS graduate
39.3%
Some college, no degree
3.7%
Associate's degree
9.2%
Bachelor's degree
28.3%
Graduate / professional
8.8%
| Metric | % |
|---|---|
| HS diploma or higher | 89.4% |
| Bachelor's or higher | 37.1% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 0 | 0.0% |
| Kindergarten | 118 | 24.5% |
| Elementary school | 178 | 37.0% |
| High school | 91 | 18.9% |
| College / grad school | 94 | 19.5% |
Employment
Industry of employment
Retail trade
33.0%
Education & healthcare
28.6%
Professional & management
15.6%
Other services
12.8%
Arts, food & hospitality
2.9%
Finance & real estate
2.7%
Construction
2.6%
Transportation & utilities
0.9%
Manufacturing
0.8%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 56.2% |
| Service | 9.2% |
| Sales & office | 15.9% |
| Natural resources & construction | 13.3% |
| Production & transportation | 5.5% |
Employment type
| Type | % |
|---|---|
| Private sector | 81.3% |
| Government | 17.9% |
| Self-employed | 0.8% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 89.1% |
| Carpool | 0.0% |
| Public transit | 0.0% |
| Walk | 0.0% |
| Work from home | 7.1% |
| Other means | 3.9% |
| Avg commute (minutes) | 37.9 |
Poverty
All people
9.5%
Under 18 years
9.0%
18 and over
9.7%
Married-couple families
6.6%
Female-led households
11.5%
Income support
| Source | % of households |
|---|---|
| Social Security | 19.0% |
| Retirement income | 13.4% |
| Supplemental Security | 7.0% |
| Cash public assistance | 2.7% |
| Food stamps / SNAP | 6.5% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 33.8% |
| High blood pressure | 35.7% |
| High cholesterol | 35.7% |
| Diabetes | 9.7% |
| Heart disease | 6.3% |
| Stroke | 2.7% |
| Asthma | 9.9% |
| Arthritis | 27.9% |
| Kidney disease | 2.7% |
| Pulmonary disease | 6.4% |
| Cancer | 7.8% |
| Behavior / access | % |
|---|---|
| Smoking | 16.1% |
| Binge drinking | 14.7% |
| No physical activity | 22.4% |
| Less than 7 hrs sleep | 32.0% |
| Depression | 19.7% |
| Fair or poor health | 10.8% |
| Poor mental health | 13.2% |
| Poor physical health | 8.7% |
| No health insurance | 8.7% |
| Visited doctor (checkup) | 78.1% |
| Visited dentist | 69.9% |
| Cholesterol screening | 93.3% |
| Teeth loss | 9.9% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 43 | 3.4% |
| Disability | % |
|---|---|
| Any disability | 7.0% |
| Under 18 | 10.5% |
| 18–64 years | 2.8% |
| 65 and over | 29.3% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 65.0% |
| Public insurance | 39.7% |
| No insurance | 4.3% |
| Uninsured under 19 | 1.9% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 1,651 | 95.4% |
| Spanish | 0 | 0.0% |
| Other Indo-European | 0 | 0.0% |
| Asian & Pacific Islander | 0 | 0.0% |
| Other languages | 0 | 0.0% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 1,731 | 100.0% |
| Born in same state | 1,671 | 96.5% |
| Born in different state | 983 | 56.8% |
| Foreign born | 60 | 3.5% |
| Naturalized citizen | 0 | 0.0% |
| Not a US citizen | 0 | 0.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 401 | 23.2% |
| Arab | 221 | 12.8% |
| Ancestry | Count | % |
|---|---|---|
| French | 195 | 11.3% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 32.0% |
| Internet access | 100.0% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 21779
What city is ZIP code 21779 in?
ZIP code 21779 is primarily assigned to Rohrersville, Maryland.
What county is ZIP code 21779 in?
ZIP code 21779 falls within Washington County, Maryland.
What is the typical home value in ZIP code 21779?
The median home value in ZIP code 21779 is $433,300.
What is the median household income in ZIP code 21779?
The median household income in ZIP code 21779 is $111,648, above the national median of ~$75,000.
What is the population of ZIP code 21779?
ZIP code 21779 has an estimated population of 1,731 residents, with a density of 178 people per square mile.
What timezone is ZIP code 21779 in?
ZIP code 21779 observes the EST timezone.