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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/16101

16101

ZIP 16101 is in New Castle, Pennsylvania, in Lawrence County; area codes 724 and 878; Eastern time. New Castle has 6 ZIP codes; the others are 16102, 16103, 16105, 16107 and 16108.

Type
Standard
Time zone
America/New_York
County
Lawrence
Metro area
Pittsburgh, PA
Population
30,767
Coordinates
40.9840, -80.2902
☼ Live from 16101 — New Castle, PA

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Where 16101 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.

★ Weird and wonderful facts about 16101
  • 🔢 Type 16101 into a pocket calculator and turn it upside down: IOIgI — not quite a word, sorry.
  • ➕ As a number, 16,101 = 3 × 3 × 1789. Its digits add up to 9, a total 375 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11111011100101
  • 🏠 Its numerical neighbours: 16066 (Cranberry Township, PA, 21 mi away) and 16102 (New Castle, PA, 7 mi away).
  • 🔄 Backwards, 16101 becomes 10161 — and that is a real ZIP code: New York, NY, 330 miles away.
  • 👥 11 other ZIP codes are made of exactly the same digits (01116, 01611, 06111, 10116, 10161, 11106, …). The farthest-flung twin is 61110 in Rockford, IL, 467 miles away.
  • 🧭 Farther north than 67% of all ZIP codes, and farther east than 73%.
  • 🎯964 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 16101 and you would come out at 40.98°S, 99.71°E — 1,090 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 07m of daylight. Shortest: 9h 13m.
  • 📏 At 69.2 square miles of land, 16101 is bigger than 68% of ZIP codes — room for about 53 Central Parks.
🌙 The sky over 16101 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population30,767This ZIP30,767
Households13,265This ZIP13,265
Housing units14,698This ZIP14,698
Median age43.8This ZIP43.8Pennsylvania40.9US 38.9
Median household income$51,128This ZIP$51,128Pennsylvania$77,971US $80,734
Median home value$110,600This ZIP$110,600Pennsylvania$254,500US $332,700
Median gross rent$725This ZIP$725Pennsylvania$1,209US $1,413
Bachelor's degree or higher18.9%This ZIP18.9%
Mean commute21.8 minThis ZIP21.8 min
Population density444.4 / sq miThis ZIP444.4 / sq mi

Business and tax activity

Business establishments773This ZIP773
Employees10,834This ZIP10,834
Annual payroll$490,562,000This ZIP$490,562,000
Tax returns filed14,230This ZIP14,230
Total adjusted gross income$789,750,000This ZIP$789,750,000

Land area

Land area69.23 sq miThis ZIP69.23 sq mi
Water area0.51 sq miThis ZIP0.51 sq mi

Other place names in 16101

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 16101

ZIPCityDistance
16103 New Castle, PA 1.0 mi
16107 New Castle, PA 1.0 mi
16108 New Castle, PA 1.0 mi
16160 West Pittsburg, PA 5.4 mi
16105 New Castle, PA 5.5 mi
16102 New Castle, PA 6.7 mi
16157 Wampum, PA 7.0 mi
16117 Ellwood City, PA 8.0 mi
16051 Portersville, PA 8.4 mi
16156 Volant, PA 8.5 mi

Find every ZIP code within 10 miles of 16101 →

Questions about this ZIP code

Where is ZIP code 16101?

16101 is in New Castle, Pennsylvania, in Lawrence County, part of the Pittsburgh, PA metropolitan area. Its published point location is 40.9840, -80.2902.

What county is 16101 in?

16101 lies in Lawrence County.

What area code is 16101?

New Castle uses area codes 724 and 878, from NANPA's telephone records.

What time zone is 16101 in?

16101 uses America/New_York.

How many people live in 16101?

About 30,767 people live in ZIP code 16101, in 13,265 households, at 444.4 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 16101?

$51,128 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 16101?

The closest are 16103 (1 mi), 16107 (1 mi), 16108 (1 mi), 16160 (5.4 mi) and 16105 (5.5 mi).

Is 16101 a PO Box ZIP code?

16101 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “16101 ZIP Code — New Castle, Pennsylvania (Lawrence County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/16101

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