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ZIP Code 20620
Callaway, MD, St. Mary's County
Population
1,115
Land area
4.3sq mi
People per sq mi
260
City
Callaway
ZIP 20620 and nearby ZIP codes
ZIP 20620 at a glance
- ZIP 20620 (Callaway) is 59% less dense than Maryland as a whole.
- The median household income is $165,972, 60% above the Maryland median of $103,678.
- A typical owner-occupied home is valued at $391,300 (7% below Maryland).
Local data for ZIP 20620
Counts from official public data
Housing and community stats
ZIP 20620, American Community Survey 2020-2024
Median household income
$165,972
Poverty rate
4.9%
Median home value
$391,300
Prices +5.6% in a year
Homeownership
96.4%
Bachelor's or higher
24.9%
Median age
41.6
Average commute
21.1 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
36
ZIP Business Patterns 2023
Employees
452
$17.3M annual payroll
PPP loans
$2.4M
31 loans
Campaign donations
$2,688
9% D, 3% R, 2026 cycle
Environment and hazard risk
ZIP 20620, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: hurricane
Storm events since 1996
1,019
Countywide, mostly thunderstorm wind
Flood insurance policies
990
2.4% of homes, county
July high / Jan low
88° / 30°F
Health statistics
Share of adults in ZIP 20620, CDC PLACES estimates
Obesity
36.4%
U.S. 33.3% +3.1 pts
Diabetes
10.3%
U.S. 12.1% -1.8 pts
Smoking
11.9%
U.S. 12.8% -0.9 pts
Uninsured (18-64)
6.0%
U.S. 11.1% -5.1 pts
Frequently asked questions
- What city is ZIP code 20620?
- ZIP code 20620 is in Callaway, MD (St. Mary's County).
- What county is ZIP code 20620 in?
- ZIP code 20620 is mostly in St. Mary's County, Maryland.
- How many people live in ZIP code 20620?
- About 1,115 people live in the 20620 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.