16421
ZIP 16421 is Harborcreek, Pennsylvania, in Erie County; area codes 814 and 582; Eastern time.
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Where 16421 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 16421 into a pocket calculator and turn it upside down: IZhgI — not quite a word, sorry.
- ➕ 16421 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 14, a total 1,416 other ZIP codes share.
- 💾In binary, the way a computer stores it:
100000000100101 - 🏠 Its numerical neighbours: 16420 (Grand Valley, PA, 39 mi away) and 16422 (Harmonsburg, PA, 40 mi away).
- 🔄 Backwards, 16421 becomes 12461 — and that is a real ZIP code: Olivebridge, NY, 293 miles away.
- 👥 30 other ZIP codes are made of exactly the same digits (11426, 12164, 12416, 12461, 14126, 14216, …). The farthest-flung twin is 64112 in Kansas City, MO, 798 miles away.
- 🧭 Farther north than 76% of all ZIP codes, and farther east than 74%.
- 🎯983 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 16421 and you would come out at 42.17°S, 100.06°E — 1,118 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 16m of daylight. Shortest: 9h 06m.
- 📏 At 10.5 square miles of land, 16421 is bigger than 28% of ZIP codes — room for about 8.0 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 2,289This ZIP2,289 |
|---|---|
| Households | 952This ZIP952 |
| Housing units | 952This ZIP952 |
| Median age | 50.6This ZIP50.6Pennsylvania40.9US 38.9 |
| Median household income | $64,091This ZIP$64,091Pennsylvania$77,971US $80,734 |
| Median home value | $224,200This ZIP$224,200Pennsylvania$254,500US $332,700 |
| Median gross rent | $652This ZIP$652Pennsylvania$1,209US $1,413 |
| Bachelor's degree or higher | 23.8%This ZIP23.8% |
| Mean commute | 18.4 minThis ZIP18.4 min |
| Population density | 217.0 / sq miThis ZIP217.0 / sq mi |
Business and tax activity
| Business establishments | 50This ZIP50 |
|---|---|
| Employees | 1,243This ZIP1,243 |
| Annual payroll | $48,894,000This ZIP$48,894,000 |
| Tax returns filed | 1,200This ZIP1,200 |
| Total adjusted gross income | $81,265,000This ZIP$81,265,000 |
Land area
| Land area | 10.55 sq miThis ZIP10.55 sq mi |
|---|---|
| Water area | 0.02 sq miThis ZIP0.02 sq mi |
ZIP codes near 16421
| ZIP | City | Distance |
|---|---|---|
16511 | Erie, PA | 3.4 mi |
16510 | Erie, PA | 4.3 mi |
16563 | Erie, PA | 4.3 mi |
16428 | North East, PA | 5.6 mi |
16514 | Erie, PA | 6.5 mi |
16515 | Erie, PA | 6.5 mi |
16531 | Erie, PA | 6.5 mi |
16544 | Erie, PA | 6.5 mi |
16565 | Erie, PA | 6.5 mi |
16503 | Erie, PA | 6.9 mi |
Find every ZIP code within 10 miles of 16421 →
Questions about this ZIP code
Where is ZIP code 16421?
16421 is in Harborcreek, Pennsylvania, in Erie County, part of the Erie, PA metropolitan area. Its published point location is 42.1696, -79.9399.
What county is 16421 in?
16421 lies in Erie County.
What area code is 16421?
Harborcreek uses area codes 814 and 582, from NANPA's telephone records.
What time zone is 16421 in?
16421 uses America/New_York.
How many people live in 16421?
About 2,289 people live in ZIP code 16421, in 952 households, at 217.0 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 16421?
$64,091 a year, against $77,971 across Pennsylvania.
What ZIP codes are near 16421?
The closest are 16511 (3.4 mi), 16510 (4.3 mi), 16563 (4.3 mi), 16428 (5.6 mi) and 16514 (6.5 mi).
Is 16421 a PO Box ZIP code?
16421 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “16421 ZIP Code — Harborcreek, Pennsylvania (Erie County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/16421
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/16421.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.