ZIP code 20634: Great Mills, MD
20634 is a ZIP code in Great Mills, Maryland, mainly in St. Mary's County, part of the Lexington Park, MD metro area. About 7,088 people live here.
- Population
- 7,088
- Median household income
- $139,375
- Typical home value
- $368,300+1.4% in 12 months
- Median rent
- $1,814gross, per month
- Median age
- 32
- Homeowners
- 65.4%of occupied homes
Shaded: ZIP code 20634's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 20634 details
| City | Great Mills |
|---|---|
| State | Maryland |
| County | St. Mary's County |
| Metro area | Lexington Park, MD |
| Time zone | Eastern Time (UTC−5), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 7 sq mi, plus 0.1 sq mi of water |
| Population density | 1,014 people per sq mi |
| Bachelor's degree or higher | 40.3% of adults 25+ |
| Average commute | 23.6 minutes |
| Center coordinates | 38.24171, -76.49828 |
Median rent in 20634 by bedrooms
| Size | Median gross rent |
|---|---|
| 2 bedrooms | $1,779/mo |
| 3 bedrooms | $1,901/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 20634
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 20620 | Callaway, MD | 1.4 mi | 1,115 |
| 20667 | Park Hall, MD | 3.3 mi | 150 |
| 20653 | Lexington Park, MD | 3.8 mi | 26,852 |
| 20619 | California, MD | 3.9 mi | 14,212 |
| 20692 | Valley Lee, MD | 4.2 mi | 505 |
| 20686 | Saint Marys City, MD | 5.2 mi | 971 |
| 20670 | Patuxent River, MD | 5.7 mi | 2,046 |
| 20630 | Drayden, MD | 5.9 mi | 559 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 20634?
A typical home in ZIP code 20634 is worth about $368,300 (Zillow Home Value Index). The median household here earns $139,375 a year. See what buying here would cost per month, with Maryland average taxes and insurance filled in.
Monthly payment for a $368,300 homeWhat can a $139,375 income afford?Rental property numbers
About ZIP code 20634
What city is ZIP code 20634?
ZIP code 20634 is in Great Mills, MD, in St. Mary's County.
What county is ZIP code 20634 in?
20634 is mainly in St. Mary's County, Maryland.
What is the population of ZIP code 20634?
About 7,088 people live in ZIP code 20634, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 20634 in?
20634 is in Eastern Time (UTC−5). It observes daylight saving time.