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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/42123

42123

ZIP 42123 is Austin, Kentucky, in Barren County; area code 270; Central time.

Type
Standard
Time zone
America/Chicago
County
Barren
Metro area
Glasgow, KY
Population
1,149
Coordinates
36.8208, -86.0004
☼ Live from 42123 — Austin, KY

Weather right now

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Local time: —

Where 42123 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 42123
  • 🔢 Type 42123 into a pocket calculator and turn it upside down: EZIZh — not quite a word, sorry.
  • ➕ As a number, 42,123 = 3 × 19 × 739. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1010010010001011
  • 🏠 Its numerical neighbours: 42122 (Alvaton, KY, 20 mi away) and 42124 (Beaumont, KY, 19 mi away).
  • 🔄 Backwards, 42123 becomes 32124 — and that is a real ZIP code: Daytona Beach, FL, 599 miles away.
  • 👥 27 other ZIP codes are made of exactly the same digits (12234, 12243, 12423, 12432, 13224, 14223, …). The farthest-flung twin is 12234 in Albany, NY, 764 miles away.
  • 🧭 Farther south than 65% of all ZIP codes, and farther east than 54%.
  • 🎯712 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 42123 and you would come out at 36.82°S, 94.00°E — 1,288 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 41m of daylight. Shortest: 9h 38m.
  • 📏 At 21.9 square miles of land, 42123 is bigger than 39% of ZIP codes — room for about 17 Central Parks.
🌙 The sky over 42123 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,149This ZIP1,149
Households473This ZIP473
Housing units614This ZIP614
Median age33.0This ZIP33.0Kentucky39.1US 38.9
Median household income$61,010This ZIP$61,010Kentucky$63,726US $80,734
Bachelor's degree or higher15.0%This ZIP15.0%
Mean commute26.3 minThis ZIP26.3 min
Population density52.4 / sq miThis ZIP52.4 / sq mi

Business and tax activity

Business establishments10This ZIP10
Employees23This ZIP23
Annual payroll$660,000This ZIP$660,000
Tax returns filed330This ZIP330
Total adjusted gross income$17,293,000This ZIP$17,293,000

Land area

Land area21.95 sq miThis ZIP21.95 sq mi
Water area1.16 sq miThis ZIP1.16 sq mi

ZIP codes near 42123

ZIPCityDistance
42156 Lucas, KY 4.0 mi
42131 Etoile, KY 5.1 mi
42133 Fountain Run, KY 7.0 mi
42153 Holland, KY 9.5 mi
42141 Glasgow, KY 9.8 mi
42157 Mount Hermon, KY 10.4 mi
42164 Scottsville, KY 10.6 mi
42142 Glasgow, KY 13.0 mi
42130 Eighty Eight, KY 13.9 mi
42140 Gamaliel, KY 14.8 mi

Find every ZIP code within 10 miles of 42123 →

Questions about this ZIP code

Where is ZIP code 42123?

42123 is in Austin, Kentucky, in Barren County, part of the Glasgow, KY micropolitan area. Its published point location is 36.8208, -86.0004.

What county is 42123 in?

42123 lies in Barren County.

What area code is 42123?

Austin uses area code 270, from NANPA's telephone records.

What time zone is 42123 in?

42123 uses America/Chicago.

How many people live in 42123?

About 1,149 people live in ZIP code 42123, in 473 households, at 52.4 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 42123?

$61,010 a year, against $63,726 across Kentucky.

What ZIP codes are near 42123?

The closest are 42156 (4 mi), 42131 (5.1 mi), 42133 (7 mi), 42153 (9.5 mi) and 42141 (9.8 mi).

Is 42123 a PO Box ZIP code?

42123 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “42123 ZIP Code — Austin, Kentucky (Barren County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/42123

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