ZIP code 21770: Monrovia, MD
21770 is a ZIP code in Monrovia, Maryland, mainly in Frederick County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metro area. About 8,751 people live here.
- Population
- 8,751
- Median household income
- $183,571
- Typical home value
- $652,500+0.4% in 12 months
- Median rent
- —gross, per month
- Median age
- 39.8
- Homeowners
- 98.8%of occupied homes
Shaded: ZIP code 21770's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 21770 details
| City | Monrovia |
|---|---|
| State | Maryland |
| County | Frederick County |
| Metro area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| Time zone | Eastern Time (UTC−5), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 11.5 sq mi, plus 0 sq mi of water |
| Population density | 764 people per sq mi |
| Bachelor's degree or higher | 54.8% of adults 25+ |
| Average commute | 35.2 minutes |
| Center coordinates | 39.35019, -77.25624 |
ZIP codes near 21770
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 21754 | Ijamsville, MD | 3.4 mi | 8,156 |
| 21774 | New Market, MD | 4.3 mi | 17,134 |
| 20872 | Damascus, MD | 4.4 mi | 13,983 |
| 21771 | Mount Airy, MD | 6.1 mi | 33,031 |
| 21704 | Frederick, MD | 6.4 mi | 20,006 |
| 20871 | Clarksburg, MD | 6.5 mi | 30,182 |
| 21701 | Frederick, MD | 7.6 mi | 43,048 |
| 21762 | Libertytown, MD | 9.0 mi | 139 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 21770?
A typical home in ZIP code 21770 is worth about $652,500 (Zillow Home Value Index). The median household here earns $183,571 a year. See what buying here would cost per month, with Maryland average taxes and insurance filled in.
Monthly payment for a $652,500 homeWhat can a $183,571 income afford?Rental property numbers
About ZIP code 21770
What city is ZIP code 21770?
ZIP code 21770 is in Monrovia, MD, in Frederick County.
What county is ZIP code 21770 in?
21770 is mainly in Frederick County, Maryland.
What is the population of ZIP code 21770?
About 8,751 people live in ZIP code 21770, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 21770 in?
21770 is in Eastern Time (UTC−5). It observes daylight saving time.