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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/16105

16105

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

Type
Standard
Time zone
America/New_York
County
Lawrence
Metro area
Pittsburgh, PA
Population
15,418
Coordinates
41.0540, -80.3394
☼ Live from 16105 — New Castle, PA

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Where 16105 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 16105
  • 🔢 Type 16105 into a pocket calculator and turn it upside down: SOIgI — not quite a word, sorry.
  • ➕ As a number, 16,105 = 5 × 3221. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11111011101001
  • 🏠 Its numerical neighbours: 16103 (New Castle, PA, 5 mi away) and 16107 (New Castle, PA, 5 mi away).
  • 🔄 Backwards, 16105 becomes 50161 — and that is a real ZIP code: Maxwell, IA, 678 miles away.
  • 👥 39 other ZIP codes are made of exactly the same digits (01516, 01561, 01615, 05161, 06115, 06151, …). The farthest-flung twin is 51106 in Sioux City, IA, 828 miles away.
  • 🧭 Farther north than 67% of all ZIP codes, and farther east than 72%.
  • 🎯961 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 16105 and you would come out at 41.05°S, 99.66°E — 1,095 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 08m of daylight. Shortest: 9h 13m.
  • 📏 At 25.6 square miles of land, 16105 is bigger than 42% of ZIP codes — room for about 19 Central Parks.
🌙 The sky over 16105 today
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🌋 Shake report
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Source: USGS.

People and housing

Population15,418This ZIP15,418
Households6,907This ZIP6,907
Housing units7,457This ZIP7,457
Median age47.0This ZIP47.0Pennsylvania40.9US 38.9
Median household income$65,855This ZIP$65,855Pennsylvania$77,971US $80,734
Median home value$183,500This ZIP$183,500Pennsylvania$254,500US $332,700
Median gross rent$1,044This ZIP$1,044Pennsylvania$1,209US $1,413
Bachelor's degree or higher33.8%This ZIP33.8%
Mean commute23.3 minThis ZIP23.3 min
Population density602.8 / sq miThis ZIP602.8 / sq mi

Business and tax activity

Business establishments425This ZIP425
Employees6,392This ZIP6,392
Annual payroll$336,734,000This ZIP$336,734,000
Tax returns filed7,860This ZIP7,860
Total adjusted gross income$636,823,000This ZIP$636,823,000

Land area

Land area25.58 sq miThis ZIP25.58 sq mi
Water area0.26 sq miThis ZIP0.26 sq mi

Other place names in 16105

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

ZIP codes near 16105

ZIPCityDistance
16172 New Wilmington, PA 4.4 mi
16103 New Castle, PA 4.7 mi
16107 New Castle, PA 4.7 mi
16108 New Castle, PA 4.7 mi
16101 New Castle, PA 5.5 mi
16142 New Wilmington, PA 5.6 mi
16116 Edinburg, PA 5.8 mi
16156 Volant, PA 6.6 mi
16143 Pulaski, PA 7.0 mi
16102 New Castle, PA 7.5 mi

Find every ZIP code within 10 miles of 16105 →

Questions about this ZIP code

Where is ZIP code 16105?

16105 is in New Castle, Pennsylvania, in Lawrence County, part of the Pittsburgh, PA metropolitan area. Its published point location is 41.0540, -80.3394.

What county is 16105 in?

16105 lies in Lawrence County.

What area code is 16105?

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

What time zone is 16105 in?

16105 uses America/New_York.

How many people live in 16105?

About 15,418 people live in ZIP code 16105, in 6,907 households, at 602.8 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 16105?

$65,855 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 16105?

The closest are 16172 (4.4 mi), 16103 (4.7 mi), 16107 (4.7 mi), 16108 (4.7 mi) and 16101 (5.5 mi).

Is 16105 a PO Box ZIP code?

16105 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “16105 ZIP Code — New Castle, Pennsylvania (Lawrence County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/16105

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