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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/40171

40171

ZIP 40171 is Union Star, Kentucky, mostly in Breckinridge County; area code 270; Central time.

Type
Standard
Time zone
America/Chicago
County
Breckinridge +1 more
Metro area
none
Population
272
Coordinates
37.9721, -86.4364
☼ Live from 40171 — Union Star, KY

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Local time: —

Where 40171 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 40171
  • 🔢 Type 40171 into a pocket calculator and turn it upside down: ILIOh — not quite a word, sorry.
  • ➕ As a number, 40,171 = 17 × 17 × 139. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001110011101011
  • 🏠 Its numerical neighbours: 40170 (Stephensport, KY, 3 mi away) and 40175 (Vine Grove, KY, 22 mi away).
  • 🔄 Backwards, 40171 becomes 17104 — and that is a real ZIP code: Harrisburg, PA, 536 miles away.
  • 👥 30 other ZIP codes are made of exactly the same digits (01471, 01741, 07114, 10174, 10471, 11704, …). The farthest-flung twin is 01741 in Carlisle, MA, 854 miles away.
  • 🧭 Farther south than 58% of all ZIP codes, and farther east than 53%.
  • 🎯665 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 40171 and you would come out at 37.97°S, 93.56°E — 1,325 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 48m of daylight. Shortest: 9h 32m.
  • 📏 At 20.2 square miles of land, 40171 is bigger than 37% of ZIP codes — room for about 15 Central Parks.
🌙 The sky over 40171 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population272This ZIP272
Households173This ZIP173
Housing units199This ZIP199
Median age61.6This ZIP61.6Kentucky39.1US 38.9
Median household income$45,929This ZIP$45,929Kentucky$63,726US $80,734
Median home value$81,800This ZIP$81,800Kentucky$205,600US $332,700
Bachelor's degree or higher8.8%This ZIP8.8%
Population density13.5 / sq miThis ZIP13.5 / sq mi

Business and tax activity

Tax returns filed110This ZIP110
Total adjusted gross income$5,592,000This ZIP$5,592,000

Land area

Land area20.16 sq miThis ZIP20.16 sq mi
Water area0.06 sq miThis ZIP0.06 sq mi

Counties 40171 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Breckinridge County 99.4%
Meade County 0.6%

ZIP codes near 40171

ZIPCityDistance
40170 Stephensport, KY 2.8 mi
40161 Rhodelia, KY 3.1 mi
40157 Payneville, KY 4.9 mi
40176 Webster, KY 6.4 mi
47574 Rome, IN 7.0 mi
47525 Derby, IN 7.5 mi
40104 Battletown, KY 9.7 mi
40146 Irvington, KY 11.6 mi
40153 Mc Quady, KY 11.8 mi
47551 Leopold, IN 12.2 mi

Find every ZIP code within 10 miles of 40171 →

Questions about this ZIP code

Where is ZIP code 40171?

40171 is in Union Star, Kentucky, in Breckinridge County. Its published point location is 37.9721, -86.4364.

What county is 40171 in?

40171 spans 2 counties: Breckinridge County and Meade County. Most of it falls in Breckinridge County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 40171?

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

What time zone is 40171 in?

40171 uses America/Chicago.

How many people live in 40171?

About 272 people live in ZIP code 40171, in 173 households, at 13.5 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 40171?

$45,929 a year, against $63,726 across Kentucky.

What ZIP codes are near 40171?

The closest are 40170 (2.8 mi), 40161 (3.1 mi), 40157 (4.9 mi), 40176 (6.4 mi) and 47574 (7 mi).

Is 40171 a PO Box ZIP code?

40171 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “40171 ZIP Code — Union Star, Kentucky (Breckinridge County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/40171

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