Checked
ZIP Code 21771
Mount Airy, MD, Frederick County
Population
33,031
Land area
89.5sq mi
People per sq mi
369
City
Mount Airy
ZIP 21771 and nearby ZIP codes
ZIP 21771 at a glance
- ZIP 21771 (Mount Airy) is 42% less dense than Maryland as a whole.
- The median household income is $157,302, 52% above the Maryland median of $103,678.
- A typical owner-occupied home is valued at $556,200 (32% above Maryland) and median rent is $2,252 a month.
Local data for ZIP 21771
Counts from official public data
Housing and community stats
ZIP 21771, American Community Survey 2020-2024
Median household income
$157,302
Poverty rate
3.1%
Median home value
$556,200
Prices +2.6% in a year
Median rent
$2,252/mo
Homeownership
94.0%
Bachelor's or higher
48.8%
Median age
40.9
Average commute
36.1 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
759
ZIP Business Patterns 2023
Employees
7,538
$400M annual payroll
PPP loans
$65M
753 loans
Campaign donations
$206K
16% D, 11% R, 2026 cycle
Environment and hazard risk
ZIP 21771, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: winter weather
Storm events since 1996
1,546
Countywide, mostly thunderstorm wind
Flood insurance policies
501
0.6% of homes, county
July high / Jan low
84° / 25°F
47.9 inches of rain a year
Health statistics
Share of adults in ZIP 21771, CDC PLACES estimates
Obesity
34.7%
U.S. 33.3% +1.4 pts
Diabetes
9.8%
U.S. 12.1% -2.3 pts
Smoking
9.2%
U.S. 12.8% -3.6 pts
Uninsured (18-64)
5.6%
U.S. 11.1% -5.5 pts
Frequently asked questions
- What city is ZIP code 21771?
- ZIP code 21771 is in Mount Airy, MD (Frederick County).
- What county is ZIP code 21771 in?
- ZIP code 21771 is mostly in Frederick County, Maryland.
- How many people live in ZIP code 21771?
- About 33,031 people live in the 21771 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.