Weather right now
Asking the National Weather Service…
Where 20688 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 20688 into a pocket calculator and turn it upside down: BBgOZ — not quite a word, sorry.
- ➕ As a number, 20,688 = 2 × 2 × 2 × 2 × 3 × 431. Its digits add up to 24, a total 2,425 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101000011010000 - 🏠 Its numerical neighbours: 20687 (Scotland, MD, 19 mi away) and 20689 (Sunderland, MD, 25 mi away).
- 🔄 Backwards, 20688 becomes 88602, which is not a ZIP code at all.
- 👥 24 other ZIP codes are made of exactly the same digits (02886, 06828, 08628, 08826, 08862, 20868, …). The farthest-flung twin is 86028 in Petrified Forest Natl Pk, AZ, 1,852 miles away.
- 🧭 Farther south than 56% of all ZIP codes, and farther east than 83%.
- 🎯1,188 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 20688 and you would come out at 38.33°S, 103.54°E — 823 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 50m of daylight. Shortest: 9h 29m.
- 📏 At 1.2 square miles of land, 20688 is bigger than 9% of ZIP codes — about 558 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,290This ZIP1,290 |
|---|---|
| Households | 651This ZIP651 |
| Housing units | 717This ZIP717 |
| Median age | 63.8This ZIP63.8Maryland39.4US 38.9 |
| Median household income | $102,950This ZIP$102,950Maryland$103,678US $80,734 |
| Median home value | $619,200This ZIP$619,200Maryland$419,900US $332,700 |
| Median gross rent | $3,222This ZIP$3,222Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 42.6%This ZIP42.6% |
| Mean commute | 23.6 minThis ZIP23.6 min |
| Population density | 1,119.8 / sq miThis ZIP1,119.8 / sq mi |
Business and tax activity
| Business establishments | 108This ZIP108 |
|---|---|
| Employees | 1,564This ZIP1,564 |
| Annual payroll | $56,530,000This ZIP$56,530,000 |
| Tax returns filed | 1,510This ZIP1,510 |
| Total adjusted gross income | $174,324,000This ZIP$174,324,000 |
Land area
| Land area | 1.15 sq miThis ZIP1.15 sq mi |
|---|---|
| Water area | 2.26 sq miThis ZIP2.26 sq mi |
Other place names in 20688
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 20688
| ZIP | City | Distance |
|---|---|---|
20629 | Dowell, MD | 1.2 mi |
20657 | Lusby, MD | 4.1 mi |
20619 | California, MD | 4.2 mi |
20670 | Patuxent River, MD | 4.2 mi |
20636 | Hollywood, MD | 5.8 mi |
20634 | Great Mills, MD | 6.2 mi |
20653 | Lexington Park, MD | 6.5 mi |
20620 | Callaway, MD | 7.2 mi |
20615 | Broomes Island, MD | 7.4 mi |
20667 | Park Hall, MD | 7.8 mi |
Find every ZIP code within 10 miles of 20688 →
Questions about this ZIP code
Where is ZIP code 20688?
20688 is in Solomons, Maryland, in Calvert County, part of the Lexington Park, MD metropolitan area. Its published point location is 38.3273, -76.4643.
What county is 20688 in?
20688 lies in Calvert County.
What area code is 20688?
Solomons uses area codes 410, 667 and 443, from NANPA's telephone records.
What time zone is 20688 in?
20688 uses America/New_York.
How many people live in 20688?
About 1,290 people live in ZIP code 20688, in 651 households, at 1,119.8 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 20688?
$102,950 a year, against $103,678 across Maryland.
What ZIP codes are near 20688?
The closest are 20629 (1.2 mi), 20657 (4.1 mi), 20619 (4.2 mi), 20670 (4.2 mi) and 20636 (5.8 mi).
Is 20688 a PO Box ZIP code?
20688 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20688 ZIP Code — Solomons, Maryland (Calvert County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20688
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20688.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.