17840
ZIP 17840 is Locust Gap, Pennsylvania, in Northumberland County; area codes 272 and 570; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Northumberland
- Metro area
- Sunbury, PA
- Population
- 188
- Coordinates
- 40.7745, -76.4264
Weather right now
Asking the National Weather Service…
Where 17840 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 17840 into a pocket calculator and turn it upside down: OhBLI — not quite a word, sorry.
- ➕ As a number, 17,840 = 2 × 2 × 2 × 2 × 5 × 223. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
100010110110000 - 🏠 Its numerical neighbours: 17837 (Lewisburg, PA, 30 mi away) and 17841 (Mc Clure, PA, 49 mi away).
- 🔄 Backwards, 17840 becomes 04871, which is not a ZIP code at all.
- 👥 57 other ZIP codes are made of exactly the same digits (01748, 01784, 04781, 07184, 07418, 07481, …). The farthest-flung twin is 84710 in Alton, UT, 1,934 miles away.
- 🧭 Farther north than 64% of all ZIP codes, and farther east than 84%.
- 🎯1,166 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 17840 and you would come out at 40.77°S, 103.57°E — 914 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 06m of daylight. Shortest: 9h 15m.
- 📏 At 2.0 square miles of land, 17840 is bigger than 12% of ZIP codes — room for about 1.5 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 188This ZIP188 |
|---|---|
| Households | 58This ZIP58 |
| Housing units | 131This ZIP131 |
| Median age | 25.3This ZIP25.3Pennsylvania40.9US 38.9 |
| Bachelor's degree or higher | 0.0% |
| Population density | 94.2 / sq miThis ZIP94.2 / sq mi |
Business and tax activity
| Business establishments | 4This ZIP4 |
|---|---|
| Employees | 404This ZIP404 |
| Annual payroll | $10,311,000This ZIP$10,311,000 |
| Tax returns filed | 120This ZIP120 |
| Total adjusted gross income | $6,321,000This ZIP$6,321,000 |
Land area
| Land area | 2.00 sq miThis ZIP2.00 sq mi |
|---|---|
| Water area | 0.00 sq miThis ZIP0.00 sq mi |
ZIP codes near 17840
| ZIP | City | Distance |
|---|---|---|
17851 | Mount Carmel, PA | 2.0 mi |
17834 | Kulpmont, PA | 2.2 mi |
17943 | Lavelle, PA | 2.6 mi |
17832 | Marion Heights, PA | 2.6 mi |
17945 | Locustdale, PA | 2.8 mi |
17921 | Ashland, PA | 3.8 mi |
17888 | Wilburton, PA | 4.0 mi |
17858 | Numidia, PA | 4.7 mi |
17936 | Gordon, PA | 4.8 mi |
17920 | Aristes, PA | 5.7 mi |
Find every ZIP code within 10 miles of 17840 →
Questions about this ZIP code
Where is ZIP code 17840?
17840 is in Locust Gap, Pennsylvania, in Northumberland County, part of the Sunbury, PA micropolitan area. Its published point location is 40.7745, -76.4264.
What county is 17840 in?
17840 lies in Northumberland County.
What area code is 17840?
Locust Gap uses area codes 272 and 570, from NANPA's telephone records.
What time zone is 17840 in?
17840 uses America/New_York.
How many people live in 17840?
About 188 people live in ZIP code 17840, in 58 households, at 94.2 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 17840?
The closest are 17851 (2 mi), 17834 (2.2 mi), 17943 (2.6 mi), 17832 (2.6 mi) and 17945 (2.8 mi).
Is 17840 a PO Box ZIP code?
17840 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “17840 ZIP Code — Locust Gap, Pennsylvania (Northumberland County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/17840
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/17840.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.