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Where 20645 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 20645 into a pocket calculator and turn it upside down: ShgOZ — not quite a word, sorry.
- ➕ As a number, 20,645 = 5 × 4129. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101000010100101 - 🏠 Its numerical neighbours: 20643 (Ironsides, MD, 19 mi away) and 20646 (La Plata, MD, 16 mi away).
- 🔄 Backwards, 20645 becomes 54602 — and that is a real ZIP code: La Crosse, WI, 836 miles away.
- 👥 59 other ZIP codes are made of exactly the same digits (02456, 02465, 02564, 02645, 04256, 04265, …). The farthest-flung twin is 56240 in Graceville, MN, 1,120 miles away.
- 🧭 Farther south than 56% of all ZIP codes, and farther east than 82%.
- 🎯1,164 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 20645 and you would come out at 38.30°S, 103.08°E — 844 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 50m of daylight. Shortest: 9h 30m.
- 📏 At 1.4 square miles of land, 20645 is bigger than 10% of ZIP codes — room for about 1.0 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 814This ZIP814 |
|---|---|
| Households | 298This ZIP298 |
| Housing units | 298This ZIP298 |
| Median age | 50.9This ZIP50.9Maryland39.4US 38.9 |
| Median household income | $191,429This ZIP$191,429Maryland$103,678US $80,734 |
| Median home value | $531,500This ZIP$531,500Maryland$419,900US $332,700 |
| Bachelor's degree or higher | 46.1%This ZIP46.1% |
| Mean commute | 43.8 minThis ZIP43.8 min |
| Population density | 591.1 / sq miThis ZIP591.1 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 61This ZIP61 |
| Annual payroll | $3,070,000This ZIP$3,070,000 |
| Tax returns filed | 440This ZIP440 |
| Total adjusted gross income | $51,290,000This ZIP$51,290,000 |
Land area
| Land area | 1.38 sq miThis ZIP1.38 sq mi |
|---|---|
| Water area | 1.29 sq miThis ZIP1.29 sq mi |
ZIP codes near 20645
| ZIP | City | Distance |
|---|---|---|
20664 | Newburg, MD | 3.2 mi |
20682 | Rock Point, MD | 3.8 mi |
20661 | Mount Victoria, MD | 4.3 mi |
20625 | Cobb Island, MD | 4.8 mi |
20618 | Bushwood, MD | 6.5 mi |
20621 | Chaptico, MD | 6.6 mi |
22448 | Dahlgren, VA | 6.7 mi |
22526 | Ninde, VA | 7.8 mi |
20622 | Charlotte Hall, MD | 8.6 mi |
20632 | Faulkner, MD | 8.9 mi |
Find every ZIP code within 10 miles of 20645 →
Questions about this ZIP code
Where is ZIP code 20645?
20645 is in Issue, Maryland, in Charles County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 38.2972, -76.9162.
What county is 20645 in?
20645 lies in Charles County.
What area code is 20645?
Issue uses area codes 240, 301 and 227, from NANPA's telephone records.
What time zone is 20645 in?
20645 uses America/New_York.
How many people live in 20645?
About 814 people live in ZIP code 20645, in 298 households, at 591.1 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 20645?
$191,429 a year, against $103,678 across Maryland.
What ZIP codes are near 20645?
The closest are 20664 (3.2 mi), 20682 (3.8 mi), 20661 (4.3 mi), 20625 (4.8 mi) and 20618 (6.5 mi).
Is 20645 a PO Box ZIP code?
20645 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20645 ZIP Code — Issue, Maryland (Charles County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20645
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20645.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.