| ZIP Code | 21778 |
|---|---|
| City | Rocky Ridge |
| State | Maryland (MD) |
| County | Frederick County |
| Area Code | 227/240/301 |
| Elevation | 405 ft |
| Latitude | 39.615806 |
|---|---|
| Longitude | -77.328421 |
| Timezone | New York (DST) |
| FIPS | 24021 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 51.8 yrs |
|---|---|
| Avg Household Size | 2.54 |
| Below Poverty | 0.0% ▼ 100% below avg |
| College Grads | 45.3% ▲ 17% above avg |
| Unemployment | 0.0% ▼ 100% below avg |
| No HS Diploma | 3 (0.5%) |
| HS Graduate | 208 (37.1%) |
| Some College | 22 (3.9%) |
| Associates | 74 (13.2%) |
| Bachelors | 117 (20.9%) |
| Graduate Degree | 137 (24.4%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $110,489 ▲ 45% above avg ↑ 49% since 2019 |
|---|---|
| Median Home Value | $415,700 ▲ 49% above avg ↑ 41% since 2019 |
| Home/Income Ratio | 3.8x (nat avg ~3.5x) |
| Total Units | 363 |
| Vacant Units | 32 |
| Avg HH Size | 2.54 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 363 |
|---|---|
| Vacant | 32 |
| Owner Occupied | 95.2% |
| Renter Occupied | 4.8% |
| Avg HH Size | 2.54 |
ZIP code 21778 is located in Rocky Ridge, Maryland, within Frederick County. With a population of 840, this is a sparsely populated ZIP code with a mature community — the median age is 51.8 years. Economically, 21778 is a upper-middle-income ZIP code: the median household income of $110,489 is above the national average.
Real estate in ZIP code 21778 represents a premium housing market. The median home value of $415,700 is above the national average. Homeownership is strong here — 95.2% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 41% since 2019.
The population of 21778 is primarily White (100.00%). Residents are well-educated — 45.3% hold a bachelor's degree or higher, which is above the national average. Household income has grown by 49% since 2019.
About 17% of workers are remote. As in most parts of the country, driving alone is the dominant commute mode at 58%.
Overall, ZIP code 21778 in Rocky Ridge, MD is characterized as upper-middle-income, well-educated, a mature community, and predominantly owner-occupied. With 840 residents, a median household income of $110,489, and a median home value of $415,700, it offers a clear picture of life in this part of Maryland.