17978
ZIP 17978 is Spring Glen, Pennsylvania, mostly in Dauphin County; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Dauphin +1 more
- Metro area
- Harrisburg-Carlisle, PA
- Population
- 688
- Coordinates
- 40.6165, -76.6523
Weather right now
Asking the National Weather Service…
Where 17978 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 17978 into a pocket calculator and turn it upside down: BLGLI — not quite a word, sorry.
- ➕ As a number, 17,978 = 2 × 89 × 101. Its digits add up to 32, a total 644 other ZIP codes share.
- 💾In binary, the way a computer stores it:
100011000111010 - 🏠 Its numerical neighbours: 17976 (Shenandoah, PA, 27 mi away) and 17979 (Summit Station, PA, 24 mi away).
- 🔄 Backwards, 17978 becomes 87971, which is not a ZIP code at all.
- 👥 10 other ZIP codes are made of exactly the same digits (18977, 78719, 79178, 79718, 79781, 87197, …). The farthest-flung twin is 91778 in San Gabriel, CA, 2,299 miles away.
- 🧭 Farther north than 62% of all ZIP codes, and farther east than 83%.
- 🎯1,155 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 17978 and you would come out at 40.62°S, 103.35°E — 917 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 05m of daylight. Shortest: 9h 16m.
- 📏 At 6.8 square miles of land, 17978 is bigger than 22% of ZIP codes — room for about 5.1 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 688This ZIP688 |
|---|---|
| Households | 198This ZIP198 |
| Housing units | 216This ZIP216 |
| Median age | 37.5This ZIP37.5Pennsylvania40.9US 38.9 |
| Median household income | $65,577This ZIP$65,577Pennsylvania$77,971US $80,734 |
| Median home value | $275,000This ZIP$275,000Pennsylvania$254,500US $332,700 |
| Median gross rent | $948This ZIP$948Pennsylvania$1,209US $1,413 |
| Bachelor's degree or higher | 2.8%This ZIP2.8% |
| Mean commute | 20.1 minThis ZIP20.1 min |
| Population density | 101.6 / sq miThis ZIP101.6 / sq mi |
Business and tax activity
| Business establishments | 16This ZIP16 |
|---|---|
| Employees | 131This ZIP131 |
| Annual payroll | $7,808,000This ZIP$7,808,000 |
| Tax returns filed | 200This ZIP200 |
| Total adjusted gross income | $12,144,000This ZIP$12,144,000 |
Land area
| Land area | 6.77 sq miThis ZIP6.77 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Counties 17978 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Dauphin County | 60.5% |
| Schuylkill County | 39.5% |
ZIP codes near 17978
| ZIP | City | Distance |
|---|---|---|
17098 | Williamstown, PA | 2.2 mi |
17968 | Sacramento, PA | 2.2 mi |
17048 | Lykens, PA | 3.2 mi |
17097 | Wiconisco, PA | 3.2 mi |
17030 | Gratz, PA | 4.9 mi |
17941 | Klingerstown, PA | 5.2 mi |
17983 | Valley View, PA | 5.7 mi |
17980 | Tower City, PA | 6.8 mi |
17867 | Rebuck, PA | 7.1 mi |
17836 | Leck Kill, PA | 7.2 mi |
Find every ZIP code within 10 miles of 17978 →
Questions about this ZIP code
Where is ZIP code 17978?
17978 is in Spring Glen, Pennsylvania, in Dauphin County, part of the Harrisburg-Carlisle, PA metropolitan area. Its published point location is 40.6165, -76.6523.
What county is 17978 in?
17978 spans 2 counties: Dauphin County and Schuylkill County. Most of it falls in Dauphin County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What time zone is 17978 in?
17978 uses America/New_York.
How many people live in 17978?
About 688 people live in ZIP code 17978, in 198 households, at 101.6 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 17978?
$65,577 a year, against $77,971 across Pennsylvania.
What ZIP codes are near 17978?
The closest are 17098 (2.2 mi), 17968 (2.2 mi), 17048 (3.2 mi), 17097 (3.2 mi) and 17030 (4.9 mi).
Is 17978 a PO Box ZIP code?
17978 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “17978 ZIP Code — Spring Glen, Pennsylvania (Dauphin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/17978
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/17978.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.