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 — RANKINGS/KY/SMALLEST-AREA

Smallest ZIP Codes in Kentucky by Land Area

What this measures. Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 42444 Poole Webster 0.02 sq mi
2 40058 Port Royal Henry 0.02 sq mi
3 40363 Perry Park Owen 0.02 sq mi
4 41526 Fords Branch Pike 0.03 sq mi
5 40434 Gray Hawk Jackson 0.04 sq mi
6 41517 Burdine Letcher 0.04 sq mi
7 40357 North Middletown Bourbon 0.04 sq mi
8 42356 Maple Mount Daviess 0.05 sq mi
9 42037 Dycusburg Crittenden 0.06 sq mi
10 40526 Lexington Fayette 0.06 sq mi
11 40231 Louisville Jefferson 0.07 sq mi
12 40280 Louisville Jefferson 0.07 sq mi
13 40063 Saint Mary Marion 0.08 sq mi
14 40849 Lejunior Harlan 0.09 sq mi
15 40448 Mc Kinney Lincoln 0.09 sq mi
16 40536 Lexington Fayette 0.10 sq mi
17 40847 Kenvir Harlan 0.11 sq mi
18 40061 Saint Catharine Washington 0.12 sq mi
19 40339 Keene Jessamine 0.12 sq mi
20 40041 Masonic Home Jefferson 0.13 sq mi
21 42631 Marshes Siding McCreary 0.13 sq mi
22 42370 Rosine Ohio 0.14 sq mi
23 40941 Garrard Clay 0.14 sq mi
24 40221 Louisville Jefferson 0.14 sq mi
25 42759 Marrowbone Cumberland 0.15 sq mi
26 40807 Benham Harlan 0.17 sq mi
27 40801 Ages Brookside Harlan 0.19 sq mi
28 40404 Berea Madison 0.20 sq mi
29 42374 South Carrollton Muhlenberg 0.23 sq mi
30 41729 Combs Perry 0.24 sq mi
31 40049 Nerinx Marion 0.32 sq mi
32 41085 Silver Grove Campbell 0.32 sq mi
33 41268 West Van Lear Johnson 0.32 sq mi
34 42061 Lowes Graves 0.35 sq mi
35 40830 Gulston Harlan 0.37 sq mi
36 41612 Bypro Floyd 0.39 sq mi
37 42758 Mannsville Taylor 0.41 sq mi
38 40507 Lexington Fayette 0.43 sq mi
39 40020 Fairfield Nelson 0.48 sq mi
40 42022 Bandana Ballard 0.49 sq mi
41 40964 Mary Alice Harlan 0.52 sq mi
42 41142 Grahn Carter 0.53 sq mi
43 42332 Cleaton Muhlenberg 0.53 sq mi
44 40310 Burgin Mercer 0.57 sq mi
45 42322 Beech Grove McLean 0.58 sq mi
46 40348 Millersburg Bourbon 0.61 sq mi
47 41713 Avawam Perry 0.71 sq mi
48 41621 Dwale Floyd 0.79 sq mi
49 41651 Minnie Floyd 0.80 sq mi
50 42354 Mc Henry Ohio 0.80 sq mi

Showing the top 50 of 780 ZIP codes in Kentucky that have this figure and meet the threshold above. 42444 ranks 1st at 0.02 sq mi, against 0.80 sq mi in 50th place.

Other rankings for Kentucky

Cite this page

zipcodes.pro. “Smallest ZIP Codes in Kentucky by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/ky/smallest-area

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