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Where 08638 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 08638 into a pocket calculator and turn it upside down: BEgBO — not quite a word, sorry.
- ➕ As a number, 8,638 = 2 × 7 × 617. Its digits add up to 25, a total 2,242 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10000110111110 - 🏠 Its numerical neighbours: 08629 (Trenton, NJ, 3 mi away) and 08640 (Joint Base Mdl, NJ, 19 mi away).
- 🔄 Backwards, 08638 becomes 83680 — and that is a real ZIP code: Meridian, ID, 2,130 miles away.
- 👥 25 other ZIP codes are made of exactly the same digits (03868, 03886, 06388, 06838, 06883, 08836, …). The farthest-flung twin is 83680 in Meridian, ID, 2,130 miles away.
- 🧭 Farther north than 59% of all ZIP codes, and farther east than 88%.
- 🎯1,256 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 08638 and you would come out at 40.25°S, 105.24°E — 824 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 03m of daylight. Shortest: 9h 18m.
- 📏 At 5.4 square miles of land, 08638 is bigger than 20% of ZIP codes — room for about 4.1 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 22,816This ZIP22,816 |
|---|---|
| Households | 9,045This ZIP9,045 |
| Housing units | 10,053This ZIP10,053 |
| Median age | 35.9This ZIP35.9New Jersey40.1US 38.9 |
| Median household income | $66,875This ZIP$66,875New Jersey$103,556US $80,734 |
| Median home value | $245,100This ZIP$245,100New Jersey$454,400US $332,700 |
| Median gross rent | $1,593This ZIP$1,593New Jersey$1,720US $1,413 |
| Bachelor's degree or higher | 32.3%This ZIP32.3% |
| Mean commute | 25.5 minThis ZIP25.5 min |
| Population density | 4,204.2 / sq miThis ZIP4,204.2 / sq mi |
Business and tax activity
| Business establishments | 553This ZIP553 |
|---|---|
| Employees | 11,018This ZIP11,018 |
| Annual payroll | $682,763,000This ZIP$682,763,000 |
| Tax returns filed | 11,590This ZIP11,590 |
| Total adjusted gross income | $644,939,000This ZIP$644,939,000 |
Land area
| Land area | 5.43 sq miThis ZIP5.43 sq mi |
|---|---|
| Water area | 0.02 sq miThis ZIP0.02 sq mi |
Other place names in 08638
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 08638
| ZIP | City | Distance |
|---|---|---|
08618 | Trenton, NJ | 1.4 mi |
08609 | Trenton, NJ | 2.3 mi |
08608 | Trenton, NJ | 2.4 mi |
08644 | Trenton, NJ | 2.8 mi |
08629 | Trenton, NJ | 2.9 mi |
08648 | Lawrence Township, NJ | 3.2 mi |
08543 | Princeton, NJ | 3.3 mi |
08601 | Trenton, NJ | 3.3 mi |
08602 | Trenton, NJ | 3.3 mi |
08603 | Trenton, NJ | 3.3 mi |
Find every ZIP code within 10 miles of 08638 →
Questions about this ZIP code
Where is ZIP code 08638?
08638 is in Trenton, New Jersey, in Mercer County, part of the Trenton-Princeton, NJ metropolitan area. Its published point location is 40.2540, -74.7634.
What county is 08638 in?
08638 lies in Mercer County.
What area code is 08638?
Trenton uses area codes 609 and 640, from NANPA's telephone records.
What time zone is 08638 in?
08638 uses America/New_York.
How many people live in 08638?
About 22,816 people live in ZIP code 08638, in 9,045 households, at 4,204.2 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 08638?
$66,875 a year, against $103,556 across New Jersey.
What ZIP codes are near 08638?
The closest are 08618 (1.4 mi), 08609 (2.3 mi), 08608 (2.4 mi), 08644 (2.8 mi) and 08629 (2.9 mi).
Is 08638 a PO Box ZIP code?
08638 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “08638 ZIP Code — Trenton, New Jersey (Mercer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/08638
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/08638.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.