Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/42135

42135

ZIP 42135 is in Franklin, Kentucky, in Simpson County; area code 270; Central time. Franklin has 2 ZIP codes; the other is 42134.

Type
No street area
Time zone
America/Chicago
County
Simpson
Metro area
Franklin, KY
Coordinates
36.7223, -86.5772

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 42134, whose figures describe that area — not this ZIP code.

☼ Live from 42135 — Franklin, KY

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Where 42135 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 42135
  • 🔢 Type 42135 into a pocket calculator and turn it upside down: SEIZh — not quite a word, sorry.
  • ➕ As a number, 42,135 = 3 × 5 × 53 × 53. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1010010010010111
  • 🏠 Its numerical neighbours: 42134 (Franklin, KY, 1 mi away) and 42140 (Gamaliel, KY, 42 mi away).
  • 🔄 Backwards, 42135 becomes 53124, which is not a ZIP code at all.
  • 👥 66 other ZIP codes are made of exactly the same digits (12345, 12435, 12453, 12534, 12543, 13425, …). The farthest-flung twin is 12345 in Schenectady, NY, 791 miles away.
  • 🧭 Farther south than 66% of all ZIP codes, and farther east than 52%.
  • 🎯685 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 42135 and you would come out at 36.72°S, 93.42°E — 1,319 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 41m of daylight. Shortest: 9h 39m.
🌙 The sky over 42135 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments16This ZIP16
Employees203This ZIP203
Annual payroll$11,244,000This ZIP$11,244,000

Land area

ZIP codes near 42135

ZIPCityDistance
42134 Franklin, KY 0.8 mi
37119 Mitchellville, TN 6.6 mi
42170 Woodburn, KY 9.3 mi
37141 Orlinda, TN 10.1 mi
37148 Portland, TN 11.0 mi
37049 Cross Plains, TN 12.5 mi
42104 Bowling Green, KY 12.8 mi
42206 Auburn, KY 14.6 mi
42202 Adairville, KY 15.1 mi
42122 Alvaton, KY 15.5 mi

Find every ZIP code within 10 miles of 42135 →

Questions about this ZIP code

Where is ZIP code 42135?

42135 is in Franklin, Kentucky, in Simpson County, part of the Franklin, KY micropolitan area. Its published point location is 36.7223, -86.5772.

What county is 42135 in?

42135 lies in Simpson County.

What area code is 42135?

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

What time zone is 42135 in?

42135 uses America/Chicago.

What ZIP codes are near 42135?

The closest are 42134 (0.8 mi), 37119 (6.6 mi), 42170 (9.3 mi), 37141 (10.1 mi) and 37148 (11 mi).

Is 42135 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “42135 ZIP Code — Franklin, Kentucky (Simpson County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/42135

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/42135.json

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