20680
ZIP 20680 is Ridge, Maryland, in St. Mary's County; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- St. Mary's
- Metro area
- Lexington Park, MD
- Population
- 663
- Coordinates
- 38.1091, -76.3859
Weather right now
Asking the National Weather Service…
Where 20680 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 20680 into a pocket calculator and turn it upside down: OBgOZ — not quite a word, sorry.
- ➕ As a number, 20,680 = 2 × 2 × 2 × 5 × 11 × 47. Its digits add up to 16, a total 1,922 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101000011001000 - 🏠 Its numerical neighbours: 20678 (Prince Frederick, MD, 31 mi away) and 20682 (Rock Point, MD, 28 mi away).
- 🔄 Backwards, 20680 becomes 08602 — and that is a real ZIP code: Trenton, NJ, 175 miles away.
- 👥 30 other ZIP codes are made of exactly the same digits (00682, 02806, 02860, 06028, 06082, 06280, …). The farthest-flung twin is 86002 in Flagstaff, AZ, 1,953 miles away.
- 🧭 Farther south than 57% of all ZIP codes, and farther east than 84%.
- 🎯1,195 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 20680 and you would come out at 38.11°S, 103.61°E — 812 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 49m of daylight. Shortest: 9h 31m.
- 📏 At 7.9 square miles of land, 20680 is bigger than 24% of ZIP codes — room for about 6.0 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 663This ZIP663 |
|---|---|
| Households | 288This ZIP288 |
| Housing units | 288This ZIP288 |
| Median age | 33.6This ZIP33.6Maryland39.4US 38.9 |
| Median home value | $397,500This ZIP$397,500Maryland$419,900US $332,700 |
| Median gross rent | $1,592This ZIP$1,592Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 29.0%This ZIP29.0% |
| Mean commute | 12.6 minThis ZIP12.6 min |
| Population density | 84.2 / sq miThis ZIP84.2 / sq mi |
Business and tax activity
| Business establishments | 17This ZIP17 |
|---|---|
| Employees | 126This ZIP126 |
| Annual payroll | $4,326,000This ZIP$4,326,000 |
| Tax returns filed | 440This ZIP440 |
| Total adjusted gross income | $41,555,000This ZIP$41,555,000 |
Land area
| Land area | 7.88 sq miThis ZIP7.88 sq mi |
|---|---|
| Water area | 1.64 sq miThis ZIP1.64 sq mi |
ZIP codes near 20680
| ZIP | City | Distance |
|---|---|---|
20684 | Saint Inigoes, MD | 2.2 mi |
20628 | Dameron, MD | 3.9 mi |
20687 | Scotland, MD | 4.0 mi |
20630 | Drayden, MD | 5.5 mi |
20686 | Saint Marys City, MD | 6.0 mi |
20692 | Valley Lee, MD | 7.9 mi |
20667 | Park Hall, MD | 8.1 mi |
20674 | Piney Point, MD | 8.5 mi |
20690 | Tall Timbers, MD | 8.8 mi |
20653 | Lexington Park, MD | 9.1 mi |
Find every ZIP code within 10 miles of 20680 →
Questions about this ZIP code
Where is ZIP code 20680?
20680 is in Ridge, Maryland, in St. Mary's County, part of the Lexington Park, MD metropolitan area. Its published point location is 38.1091, -76.3859.
What county is 20680 in?
20680 lies in St. Mary's County.
What time zone is 20680 in?
20680 uses America/New_York.
How many people live in 20680?
About 663 people live in ZIP code 20680, in 288 households, at 84.2 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 20680?
The closest are 20684 (2.2 mi), 20628 (3.9 mi), 20687 (4 mi), 20630 (5.5 mi) and 20686 (6 mi).
Is 20680 a PO Box ZIP code?
20680 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20680 ZIP Code — Ridge, Maryland (St. Mary's County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20680
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20680.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.