20686
ZIP 20686 is Saint Marys City, 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
- 971
- Coordinates
- 38.1871, -76.4328
Weather right now
Asking the National Weather Service…
Where 20686 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 20686 into a pocket calculator and turn it upside down: gBgOZ — not quite a word, sorry.
- ➕ As a number, 20,686 = 2 × 10343. Its digits add up to 22, a total 2,607 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101000011001110 - 🏠 Its numerical neighbours: 20685 (Saint Leonard, MD, 18 mi away) and 20687 (Scotland, MD, 10 mi away).
- 🔄 Backwards, 20686 becomes 68602 — and that is a real ZIP code: Columbus, NE, 1,131 miles away.
- 👥 17 other ZIP codes are made of exactly the same digits (02668, 06268, 20866, 26680, 28606, 28660, …). The farthest-flung twin is 80266 in Denver, CO, 1,526 miles away.
- 🧭 Farther south than 57% of all ZIP codes, and farther east than 84%.
- 🎯1,191 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 20686 and you would come out at 38.19°S, 103.57°E — 817 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 49m of daylight. Shortest: 9h 30m.
- 📏 At 0.271 square miles of land, 20686 is bigger than 3% of ZIP codes — about 131 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 971This ZIP971 |
|---|---|
| Households | 0 |
| Housing units | 0 |
| Median age | 20.3This ZIP20.3Maryland39.4US 38.9 |
| Bachelor's degree or higher | 100.0%This ZIP100.0% |
| Mean commute | 12.1 minThis ZIP12.1 min |
| Population density | 3,583.0 / sq miThis ZIP3,583.0 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 72This ZIP72 |
| Annual payroll | $1,680,000This ZIP$1,680,000 |
Land area
| Land area | 0.27 sq miThis ZIP0.27 sq mi |
|---|---|
| Water area | 1.54 sq miThis ZIP1.54 sq mi |
ZIP codes near 20686
| ZIP | City | Distance |
|---|---|---|
20667 | Park Hall, MD | 2.1 mi |
20630 | Drayden, MD | 2.5 mi |
20653 | Lexington Park, MD | 3.5 mi |
20692 | Valley Lee, MD | 3.7 mi |
20684 | Saint Inigoes, MD | 4.3 mi |
20634 | Great Mills, MD | 5.2 mi |
20628 | Dameron, MD | 5.6 mi |
20620 | Callaway, MD | 5.8 mi |
20690 | Tall Timbers, MD | 5.9 mi |
20680 | Ridge, MD | 6.0 mi |
Find every ZIP code within 10 miles of 20686 →
Questions about this ZIP code
Where is ZIP code 20686?
20686 is in Saint Marys City, Maryland, in St. Mary's County, part of the Lexington Park, MD metropolitan area. Its published point location is 38.1871, -76.4328.
What county is 20686 in?
20686 lies in St. Mary's County.
What time zone is 20686 in?
20686 uses America/New_York.
How many people live in 20686?
About 971 people live in ZIP code 20686, at 3,583.0 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 20686?
The closest are 20667 (2.1 mi), 20630 (2.5 mi), 20653 (3.5 mi), 20692 (3.7 mi) and 20684 (4.3 mi).
Is 20686 a PO Box ZIP code?
20686 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20686 ZIP Code — Saint Marys City, Maryland (St. Mary's County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20686
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20686.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.