What city is ZIP code 20661?

ZIP code 20661 is in Cobb Island, MD (Charles County).

What county is ZIP code 20661 in?

ZIP code 20661 is mostly in Charles County, Maryland.

How many people live in ZIP code 20661?

About 0 people live in the 20661 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 20661

Cobb Island, MD, Charles County

Population

Land area

0sq mi

City

Cobb Island

ZIP 20661 and nearby ZIP codes

Full map

Local data for ZIP 20661

Counts from official public data

Post Offices1

Environment and hazard risk

ZIP 20661, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: heat wave

Storm events since 1996

967

Countywide, mostly thunderstorm wind

Flood insurance policies

547

0.9% of homes, county

July high / Jan low

85° / 25°F

48.1 inches of rain a year

Hazards, floods and storm history Check a flood zone

Frequently asked questions

What city is ZIP code 20661?: ZIP code 20661 is in Cobb Island, MD (Charles County).
What county is ZIP code 20661 in?: ZIP code 20661 is mostly in Charles County, Maryland.
How many people live in ZIP code 20661?: About 0 people live in the 20661 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.