| ZIP Code | 21104 |
|---|---|
| City | Marriottsville |
| State | Maryland (MD) |
| County | Carroll County |
| Area Code | 410/443/667 |
| Elevation | 329 ft |
| Latitude | 39.346904 |
|---|---|
| Longitude | -76.912757 |
| Timezone | New York (DST) |
| FIPS | 24027 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 46.0 yrs ↓ 4% since 2019 |
|---|---|
| Avg Household Size | 2.98 |
| Below Poverty | 2.5% ▼ 75% below avg |
| College Grads | 66.2% ▲ 71% above avg |
| Unemployment | 2.5% ▼ 49% below avg |
| No HS Diploma | 42 (1.1%) |
| HS Graduate | 630 (15.9%) |
| Some College | 374 (9.4%) |
| Associates | 298 (7.5%) |
| Bachelors | 132 (3.3%) |
| Graduate Degree | 2,498 (62.9%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $199,803 ▲ 162% above avg ↑ 33% since 2019 |
|---|---|
| Median Home Value | $659,700 ▲ 137% above avg ↑ 21% since 2019 |
| Home/Income Ratio | 3.3x (nat avg ~3.5x) |
| Total Units | 1,985 |
| Vacant Units | 54 |
| Avg HH Size | 2.98 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 1,985 |
|---|---|
| Vacant | 54 |
| Owner Occupied | 96.9% |
| Renter Occupied | 3.1% |
| Avg HH Size | 2.98 |
ZIP code 21104 is located in Marriottsville, Maryland, within Carroll County. With a population of 5,786, this is a lightly populated ZIP code with a mature community — the median age is 46 years. Economically, 21104 is a affluent ZIP code: the median household income of $199,803 is more than double the national average.
Real estate in ZIP code 21104 represents a premium housing market. The median home value of $659,700 is more than double the national average. Homeownership is strong here — 96.9% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 21% since 2019.
The population of 21104 is primarily White (74.87%). Residents are highly educated — 66.2% hold a bachelor's degree or higher, which is significantly above the national average. Poverty affects a relatively small share of residents at 2.5%. Household income has grown by 33% since 2019.
The unemployment rate in 21104 stands at 2.5%, which is below the national average. About 20% of workers are remote. As in most parts of the country, driving alone is the dominant commute mode at 76%.
Overall, ZIP code 21104 in Marriottsville, MD is characterized as affluent, highly educated, a mature community, and predominantly owner-occupied. With 5,786 residents, a median household income of $199,803, and a median home value of $659,700, it offers a clear picture of life in this part of Maryland.