| ZIP Code | 21758 |
|---|---|
| City | Knoxville |
| State | Maryland (MD) |
| County | Frederick County |
| Area Code | 227/240/301 |
| Elevation | 1,137 ft |
| Latitude | 39.353205 |
|---|---|
| Longitude | -77.656813 |
| Timezone | New York (DST) |
| FIPS | 24021 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 41.8 yrs ↑ 3% since 2019 |
|---|---|
| Avg Household Size | 2.65 |
| Below Poverty | 5.3% ▼ 47% below avg |
| College Grads | 51.1% ▲ 32% above avg |
| Unemployment | 7.1% ▲ 45% above avg |
| No HS Diploma | 3 (0.1%) |
| HS Graduate | 869 (31.9%) |
| Some College | 231 (8.5%) |
| Associates | 230 (8.4%) |
| Bachelors | 205 (7.5%) |
| Graduate Degree | 1,186 (43.5%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $110,694 ▲ 45% above avg ↑ 37% since 2019 |
|---|---|
| Median Home Value | $388,200 ▲ 39% above avg ↑ 38% since 2019 |
| Home/Income Ratio | 3.5x (nat avg ~3.5x) |
| Median Rent | $1,696/mo ↑ 26% since 2019 |
| Total Units | 1,672 |
| Vacant Units | 71 |
| Avg HH Size | 2.65 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 1,672 |
|---|---|
| Vacant | 71 |
| Owner Occupied | 88.1% |
| Renter Occupied | 11.9% |
| Avg HH Size | 2.65 |
ZIP code 21758 is located in Knoxville, Maryland, within Frederick County. With a population of 4,238, this is a lightly populated ZIP code with a middle-aged community — the median age is 41.8 years. Economically, 21758 is a upper-middle-income ZIP code: the median household income of $110,694 is above the national average.
Real estate in ZIP code 21758 represents a mid-range housing market. The median home value of $388,200 is above the national average. Renters can expect to pay around $1,696 per month in median rent. Homeownership is strong here — 88.1% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 38% since 2019.
The population of 21758 is primarily White (80.91%). Residents are well-educated — 51.1% hold a bachelor's degree or higher, which is above the national average. Poverty affects a relatively small share of residents at 5.3%. Household income has grown by 37% since 2019.
The unemployment rate in 21758 stands at 7.1%, which is above the national average. About 22% of workers are remote. As in most parts of the country, driving alone is the dominant commute mode at 68%.
Overall, ZIP code 21758 in Knoxville, MD is characterized as upper-middle-income, well-educated, a middle-aged community, and predominantly owner-occupied. With 4,238 residents, a median household income of $110,694, and a median home value of $388,200, it offers a clear picture of life in this part of Maryland.