What city is ZIP code 20618?

ZIP code 20618 is in Rock Point, MD (St. Mary's County).

What county is ZIP code 20618 in?

ZIP code 20618 is mostly in St. Mary's County, Maryland.

How many people live in ZIP code 20618?

About 1,705 people live in the 20618 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 20618

Rock Point, MD, St. Mary's County

Population

1,705

Land area

7.6sq mi

People per sq mi

225

City

Rock Point

ZIP 20618 and nearby ZIP codes

Full map

ZIP 20618 at a glance

ZIP 20618 (Rock Point) is 65% less dense than Maryland as a whole.
The median household income is $105,508, close to the Maryland median.
A typical owner-occupied home is valued at $355,000 (15% below Maryland) and median rent is $1,905 a month.

Local data for ZIP 20618

Counts from official public data

Housing and community stats

ZIP 20618, American Community Survey 2020-2024

Full profile

Median household income

$105,508

Poverty rate

3.1%

Median home value

$355,000

Median rent

$1,905/mo

Homeownership

83.4%

Bachelor's or higher

16.6%

Median age

52.0

Average commute

40.2 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

ZIP Business Patterns 2023

Employees

162

$5.2M annual payroll

PPP loans

$1.1M

17 loans

Campaign donations

$2,315

48% D, 38% R, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 20618, 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

85° / 25°F

48.1 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 20618, CDC PLACES estimates

All 40 measures

Obesity

37.9%

U.S. 33.3% +4.6 pts

Diabetes

13.8%

U.S. 12.1% +1.7 pts

Smoking

13.6%

U.S. 12.8% +0.8 pts

Uninsured (18-64)

8.3%

U.S. 11.1% -2.8 pts

Frequently asked questions

What city is ZIP code 20618?: ZIP code 20618 is in Rock Point, MD (St. Mary's County).
What county is ZIP code 20618 in?: ZIP code 20618 is mostly in St. Mary's County, Maryland.
How many people live in ZIP code 20618?: About 1,705 people live in the 20618 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.