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/CT/SMALLEST-AREA

Smallest ZIP Codes in Connecticut 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 06376 South Lyme New London 0.03 sq mi
2 06072 Somersville Tolland 0.03 sq mi
3 06258 Pomfret Windham 0.04 sq mi
4 06387 Wauregan Windham 0.06 sq mi
5 06020 Canton Center Hartford 0.11 sq mi
6 06080 Suffield Hartford 0.13 sq mi
7 06263 Rogers Windham 0.15 sq mi
8 06061 Pine Meadow Litchfield 0.16 sq mi
9 06467 Milldale Hartford 0.23 sq mi
10 06059 North Canton Hartford 0.26 sq mi
11 06353 Montville New London 0.27 sq mi
12 06510 New Haven New Haven 0.27 sq mi
13 06389 Yantic New London 0.28 sq mi
14 06459 Middletown Middlesex 0.33 sq mi
15 06350 Hanover New London 0.39 sq mi
16 06901 Stamford Fairfield 0.51 sq mi
17 06103 Hartford Hartford 0.58 sq mi
18 06336 Gilman New London 0.61 sq mi
19 06758 Lakeside Litchfield 0.63 sq mi
20 06081 Tariffville Hartford 0.65 sq mi
21 06702 Waterbury New Haven 0.67 sq mi
22 06243 East Killingly Windham 0.73 sq mi
23 06439 Hadlyme New London 0.79 sq mi
24 06266 South Windham Windham 0.93 sq mi
25 06380 Taftville New London 0.96 sq mi
26 06710 Waterbury New Haven 0.97 sq mi
27 06023 East Berlin Hartford 1.00 sq mi
28 06444 Marion Hartford 1.02 sq mi
29 06608 Bridgeport Fairfield 1.03 sq mi
30 06414 Cobalt Middlesex 1.06 sq mi
31 06262 Quinebaug Windham 1.16 sq mi
32 06607 Bridgeport Fairfield 1.16 sq mi
33 06409 Centerbrook Middlesex 1.17 sq mi
34 06079 Taconic Litchfield 1.18 sq mi
35 06853 Norwalk Fairfield 1.21 sq mi
36 06332 Central Village Windham 1.24 sq mi
37 06269 Storrs Mansfield Tolland 1.25 sq mi
38 06456 Middle Haddam Middlesex 1.33 sq mi
39 06906 Stamford Fairfield 1.35 sq mi
40 06264 Scotland Windham 1.51 sq mi
41 06022 Collinsville Hartford 1.67 sq mi
42 06519 New Haven New Haven 1.77 sq mi
43 06373 Oneco Windham 1.85 sq mi
44 06481 Rockfall Middlesex 1.91 sq mi
45 06907 Stamford Fairfield 1.96 sq mi
46 06338 Mashantucket New London 1.98 sq mi
47 06119 West Hartford Hartford 2.08 sq mi
48 06105 Hartford Hartford 2.27 sq mi
49 06870 Old Greenwich Fairfield 2.27 sq mi
50 06605 Bridgeport Fairfield 2.29 sq mi

Showing the top 50 of 288 ZIP codes in Connecticut that have this figure and meet the threshold above. 06376 ranks 1st at 0.03 sq mi, against 2.29 sq mi in 50th place.

Other rankings for Connecticut

Cite this page

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

Underlying data is public domain or openly licensed — sources, vintages and licences.