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Where 20657 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 20657 into a pocket calculator and turn it upside down: LSgOZ — not quite a word, sorry.
- ➕ As a number, 20,657 = 7 × 13 × 227. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101000010110001 - 🏠 Its numerical neighbours: 20656 (Loveville, MD, 13 mi away) and 20658 (Marbury, MD, 41 mi away).
- 🔄 Backwards, 20657 becomes 75602 — and that is a real ZIP code: Longview, TX, 1,102 miles away.
- 👥 69 other ZIP codes are made of exactly the same digits (02576, 02657, 02675, 05672, 05762, 06725, …). The farthest-flung twin is 57620 in Bison, SD, 1,419 miles away.
- 🧭 Farther south than 56% of all ZIP codes, and farther east than 84%.
- 🎯1,188 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 20657 and you would come out at 38.38°S, 103.56°E — 824 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 51m of daylight. Shortest: 9h 29m.
- 📏 At 29.9 square miles of land, 20657 is bigger than 46% of ZIP codes — room for about 23 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 20,699This ZIP20,699 |
|---|---|
| Households | 7,371This ZIP7,371 |
| Housing units | 8,178This ZIP8,178 |
| Median age | 37.4This ZIP37.4Maryland39.4US 38.9 |
| Median household income | $115,748This ZIP$115,748Maryland$103,678US $80,734 |
| Median home value | $333,500This ZIP$333,500Maryland$419,900US $332,700 |
| Median gross rent | $1,755This ZIP$1,755Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 33.3%This ZIP33.3% |
| Mean commute | 38.9 minThis ZIP38.9 min |
| Population density | 693.1 / sq miThis ZIP693.1 / sq mi |
Business and tax activity
| Business establishments | 181This ZIP181 |
|---|---|
| Employees | 2,217This ZIP2,217 |
| Annual payroll | $189,922,000This ZIP$189,922,000 |
| Tax returns filed | 9,710This ZIP9,710 |
| Total adjusted gross income | $757,137,000This ZIP$757,137,000 |
Land area
| Land area | 29.86 sq miThis ZIP29.86 sq mi |
|---|---|
| Water area | 9.14 sq miThis ZIP9.14 sq mi |
Other place names in 20657
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 20657
| ZIP | City | Distance |
|---|---|---|
20629 | Dowell, MD | 2.9 mi |
20688 | Solomons, MD | 4.1 mi |
20685 | Saint Leonard, MD | 5.9 mi |
20615 | Broomes Island, MD | 6.2 mi |
20670 | Patuxent River, MD | 7.1 mi |
20636 | Hollywood, MD | 7.2 mi |
20619 | California, MD | 7.9 mi |
20676 | Port Republic, MD | 9.1 mi |
21669 | Taylors Island, MD | 9.5 mi |
20653 | Lexington Park, MD | 10.2 mi |
Find every ZIP code within 10 miles of 20657 →
Questions about this ZIP code
Where is ZIP code 20657?
20657 is in Lusby, Maryland, in Calvert County, part of the Lexington Park, MD metropolitan area. Its published point location is 38.3842, -76.4401.
What county is 20657 in?
20657 lies in Calvert County.
What area code is 20657?
Lusby uses area codes 410, 667 and 443, from NANPA's telephone records.
What time zone is 20657 in?
20657 uses America/New_York.
How many people live in 20657?
About 20,699 people live in ZIP code 20657, in 7,371 households, at 693.1 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 20657?
$115,748 a year, against $103,678 across Maryland.
What ZIP codes are near 20657?
The closest are 20629 (2.9 mi), 20688 (4.1 mi), 20685 (5.9 mi), 20615 (6.2 mi) and 20670 (7.1 mi).
Is 20657 a PO Box ZIP code?
20657 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20657 ZIP Code — Lusby, Maryland (Calvert County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20657
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20657.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.