ZIP code 20634
Where is ZIP code 20634?
Great Mills, Maryland
St. Mary's County · Standard ZIP code
ZIP code 20634 belongs to Great Mills, Maryland in St. Mary's County. 20634 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 227, 240 and 301. About 7,088 people live in the 20634 area, where the median household income is $139,375. The closest ZIP codes are 20653 (Lexington Park, 2.6 mi southeast), 20619 (California, 3 mi northwest) and 20620 (Callaway, 3.1 mi southwest).
| ZIP code | 20634 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Great Mills |
| State | Maryland (MD) |
| County | St. Mary's County |
| Time zone | Eastern Time · now |
| Area codes | 227, 240, 301 |
| Coordinates | 38.2674, -76.4954 map |
| 3-digit prefix | 206 |
Population and income in 20634
| Population | 7,088 · higher than 56% of Maryland ZIP codes |
|---|---|
| People per square mile | 1,014 · higher than 65% of Maryland ZIP codes |
| Median age | 32 years · lower than 94% of Maryland ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $139,375 · higher than 75% of Maryland ZIP codes |
| Income per person | $61,800 |
| Below the poverty line | 4.7% |
| Bachelor’s degree or higher | 40% of adults 25+ |
| Median home value | $342,300 · lower than 69% of Maryland ZIP codes |
| Median rent | $1,814 a month |
| Housing units | 3,026 |
| Households | 2,694 (2.62 people on average) |
| Owners / renters | 65% / 35% |
| Land area | 6.99 sq mi (plus 0.07 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 20634. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 20634
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 20653 | Lexington Park, MD | 2.6 mi SE | Standard |
| 20619 | California, MD | 3 mi NW | Standard |
| 20620 | Callaway, MD | 3.1 mi SW | Standard |
| 20670 | Patuxent River, MD | 3.2 mi E | Standard |
| 20667 | Park Hall, MD | 4.5 mi SE | Standard |
| 20688 | Solomons, MD | 4.6 mi N | Standard |
| 20629 | Dowell, MD | 5.3 mi NE | PO Box only |
| 20692 | Valley Lee, MD | 5.4 mi S | Standard |
| 20686 | Saint Marys City, MD | 6.5 mi SE | PO Box only |
| 20630 | Drayden, MD | 6.7 mi S | Standard |
| 20635 | Helen, MD | 6.8 mi NW | PO Box only |
| 20636 | Hollywood, MD | 6.9 mi NW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 20634 or measure the distance to another ZIP code.
How to address mail to 20634
123 MAIN ST
GREAT MILLS MD 20634
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (20634-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 20634?
- 20634 is a Great Mills, Maryland ZIP code.
- What county is 20634 in?
- ZIP code 20634 is in St. Mary's County, Maryland.
- What time zone is ZIP code 20634 in?
- 20634 is in the Eastern Time zone (America/New_York).
- What area code is 20634?
- Phone numbers in ZIP code 20634 use area codes 227, 240 and 301.
- What is the population of ZIP code 20634?
- About 7,088 people live in ZIP code 20634, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 20634?
- The median household income in 20634 is $139,375 a year, higher than 75% of Maryland ZIP codes.
- What ZIP codes are near 20634?
- The nearest ZIP codes to 20634 are 20653 (Lexington Park, 2.6 miles), 20619 (California, 3 miles), 20620 (Callaway, 3.1 miles) and 20670 (Patuxent River, 3.2 miles).