21792 ZIP Code — Unionville, MD
Frederick County, Maryland
ZIP code 21792 is located in Unionville, Maryland, within Frederick County. It covers approximately 0.00 square miles and serves a population of 0 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 301.
0
population
0.00
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
21792 ZIP code map
Cities in ZIP code 21792
Below are the cities the US Postal Service accepts for ZIP code 21792. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Unionville | Acceptable |
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 24 |
| County FIPS | 021 |
| Geography | |
|---|---|
| Land area | 0.00 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 39.4748 |
| Longitude | -77.1859 |
| Timezone | Eastern (ET) |
| Area code | 301 |