What city is ZIP code 20690?

ZIP code 20690 is in Tall Timbers, MD (St. Mary's County).

What county is ZIP code 20690 in?

ZIP code 20690 is mostly in St. Mary's County, Maryland.

How many people live in ZIP code 20690?

About 1,077 people live in the 20690 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 20690

Tall Timbers, MD, St. Mary's County

Population

1,077

Land area

1.7sq mi

People per sq mi

646

City

Tall Timbers

ZIP 20690 and nearby ZIP codes

Full map

ZIP 20690 at a glance

Households here earn a median of $122,750 a year, 18% more than the Maryland figure of $103,678.
A typical owner-occupied home is valued at $379,700 (10% below Maryland) and median rent is $1,412 a month.

Local data for ZIP 20690

Counts from official public data

Housing and community stats

ZIP 20690, American Community Survey 2020-2024

Full profile

Median household income

$122,750

Poverty rate

9.3%

Median home value

$379,700

Prices +23.2% in a year

Median rent

$1,412/mo

Homeownership

75.3%

Bachelor's or higher

39.0%

Median age

45.7

Average commute

39.5 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

ZIP Business Patterns 2023

Employees

$852K annual payroll

PPP loans

$743K

14 loans

Campaign donations

$8,867

24% D, 9% R, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 20690, from FEMA, NOAA and EPA

Full report

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

87° / 30°F

46.3 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 20690, CDC PLACES estimates

All 40 measures

Obesity

35.0%

U.S. 33.3% +1.7 pts

Diabetes

11.6%

U.S. 12.1% -0.5 pts

Smoking

11.4%

U.S. 12.8% -1.4 pts

Uninsured (18-64)

6.0%

U.S. 11.1% -5.1 pts

Frequently asked questions

What city is ZIP code 20690?: ZIP code 20690 is in Tall Timbers, MD (St. Mary's County).
What county is ZIP code 20690 in?: ZIP code 20690 is mostly in St. Mary's County, Maryland.
How many people live in ZIP code 20690?: About 1,077 people live in the 20690 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.