45721
ZIP 45721 is Coal Run, Ohio, in Washington County; area code 740; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Washington
- Metro area
- Marietta, OH
- Population
- 15
- Coordinates
- 39.5658, -81.5834
Weather right now
Asking the National Weather Service…
Where 45721 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 45721 into a pocket calculator and turn it upside down: IZLSh — not quite a word, sorry.
- ➕ As a number, 45,721 = 13 × 3517. Its digits add up to 19, a total 2,454 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1011001010011001 - 🏠 Its numerical neighbours: 45720 (Chester, OH, 37 mi away) and 45723 (Coolville, OH, 27 mi away).
- 🔄 Backwards, 45721 becomes 12754 — and that is a real ZIP code: Liberty, NY, 390 miles away.
- 👥 63 other ZIP codes are made of exactly the same digits (12457, 12475, 12547, 12574, 12745, 12754, …). The farthest-flung twin is 75241 in Dallas, TX, 970 miles away.
- 🧭 Farther north than 53% of all ZIP codes, and farther east than 68%.
- 🎯902 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 45721 and you would come out at 39.57°S, 98.42°E — 1,108 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.
- 📏 At 0.031 square miles of land, 45721 is bigger than 0% of ZIP codes — about 15 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 15This ZIP15 |
|---|---|
| Households | 15This ZIP15 |
| Housing units | 44This ZIP44 |
| Bachelor's degree or higher | 0.0% |
| Population density | 483.9 / sq miThis ZIP483.9 / sq mi |
Land area
| Land area | 0.03 sq miThis ZIP0.03 sq mi |
|---|---|
| Water area | 0.00 sq mi |
ZIP codes near 45721
| ZIP | City | Distance |
|---|---|---|
45715 | Beverly, OH | 3.9 mi |
45744 | Lowell, OH | 4.9 mi |
45786 | Waterford, OH | 5.8 mi |
45746 | Macksburg, OH | 7.4 mi |
45787 | Watertown, OH | 7.4 mi |
45727 | Dexter City, OH | 7.8 mi |
45729 | Fleming, OH | 10.2 mi |
45788 | Whipple, OH | 11.6 mi |
43724 | Caldwell, OH | 11.6 mi |
43787 | Stockport, OH | 12.0 mi |
Find every ZIP code within 10 miles of 45721 →
Questions about this ZIP code
Where is ZIP code 45721?
45721 is in Coal Run, Ohio, in Washington County, part of the Marietta, OH micropolitan area. Its published point location is 39.5658, -81.5834.
What county is 45721 in?
45721 lies in Washington County.
What area code is 45721?
Coal Run uses area code 740, from NANPA's telephone records.
What time zone is 45721 in?
45721 uses America/New_York.
How many people live in 45721?
About 15 people live in ZIP code 45721, in 15 households, at 483.9 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 45721?
The closest are 45715 (3.9 mi), 45744 (4.9 mi), 45786 (5.8 mi), 45746 (7.4 mi) and 45787 (7.4 mi).
Is 45721 a PO Box ZIP code?
45721 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “45721 ZIP Code — Coal Run, Ohio (Washington County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/45721
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/45721.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.