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ZIP Code 20851
Rockville, MD, Montgomery County
Population
14,946
Land area
2.5sq mi
People per sq mi
5,895
City
Rockville
ZIP 20851 and nearby ZIP codes
ZIP 20851 at a glance
- ZIP 20851 (Rockville) is about 9.2 times as dense as Maryland as a whole.
- The median household income is $126,411, 22% above the Maryland median of $103,678.
- A typical owner-occupied home is valued at $568,900 (35% above Maryland) and median rent is $2,043 a month.
Local data for ZIP 20851
Counts from official public data
Housing and community stats
ZIP 20851, American Community Survey 2020-2024
Median household income
$126,411
Poverty rate
9.1%
Median home value
$568,900
Prices +3.3% in a year
Median rent
$2,043/mo
Homeownership
57.5%
Bachelor's or higher
46.2%
Median age
38.6
Average commute
31.8 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
168
ZIP Business Patterns 2023
Employees
1,180
$60.7M annual payroll
PPP loans
$11.4M
260 loans
Campaign donations
$57.2K
57% D, 5% R, 2026 cycle
Environment and hazard risk
ZIP 20851, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Moderate
Top: winter weather
Storm events since 1996
1,849
Countywide, mostly thunderstorm wind
Flood insurance policies
2,029
0.8% of homes, county
July high / Jan low
87° / 27°F
41.3 inches of rain a year
Health statistics
Share of adults in ZIP 20851, CDC PLACES estimates
Obesity
26.9%
U.S. 33.3% -6.4 pts
Diabetes
9.9%
U.S. 12.1% -2.2 pts
Smoking
8.7%
U.S. 12.8% -4.1 pts
Uninsured (18-64)
12.5%
U.S. 11.1% +1.4 pts
Frequently asked questions
- What city is ZIP code 20851?
- ZIP code 20851 is in Rockville, MD (Montgomery County).
- What county is ZIP code 20851 in?
- ZIP code 20851 is mostly in Montgomery County, Maryland.
- How many people live in ZIP code 20851?
- About 14,946 people live in the 20851 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.