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/YOUNGEST

ZIP Codes With the Youngest Population in Connecticut

What this measures. Median age of residents, lowest first. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 06353 Montville New London 12.4
2 06336 Gilman New London 14.5
3 06263 Rogers Windham 19.6
4 06269 Storrs Mansfield Tolland 19.7
5 06459 Middletown Middlesex 20.7
6 06268 Storrs Mansfield Tolland 21.9
7 06510 New Haven New Haven 26.4
8 06059 North Canton Hartford 28.5
9 06103 Hartford Hartford 29.8
10 06511 New Haven New Haven 29.8
11 06380 Taftville New London 30.0
12 06607 Bridgeport Fairfield 30.1
13 06112 Hartford Hartford 30.3
14 06387 Wauregan Windham 30.6
15 06120 Hartford Hartford 30.7
16 06515 New Haven New Haven 30.7
17 06901 Stamford Fairfield 30.9
18 06226 Willimantic Windham 31.3
19 06518 Hamden New Haven 31.9
20 06439 Hadlyme New London 32.2
21 06106 Hartford Hartford 32.7
22 06053 New Britain Hartford 32.8
23 06373 Oneco Windham 33.5
24 06519 New Haven New Haven 33.5
25 06605 Bridgeport Fairfield 33.6
26 06340 Groton New London 33.7
27 06332 Central Village Windham 33.8
28 06051 New Britain Hartford 33.9
29 06704 Waterbury New Haven 34.6
30 06320 New London New London 34.7
31 06608 Bridgeport Fairfield 34.7
32 06119 West Hartford Hartford 34.9
33 06018 Canaan Litchfield 35.3
34 06354 Moosup Windham 35.3
35 06114 Hartford Hartford 35.4
36 06516 West Haven New Haven 35.8
37 06108 East Hartford Hartford 36.0
38 06706 Waterbury New Haven 36.1
39 06243 East Killingly Windham 36.8
40 06024 East Canaan Litchfield 36.9
41 06105 Hartford Hartford 36.9
42 06040 Manchester Hartford 37.0
43 06042 Manchester Hartford 37.0
44 06339 Ledyard New London 37.0
45 06604 Bridgeport Fairfield 37.0
46 06335 Gales Ferry New London 37.2
47 06907 Stamford Fairfield 37.2
48 06279 Willington Tolland 37.5
49 06854 Norwalk Fairfield 37.7
50 06902 Stamford Fairfield 37.7

Showing the top 50 of 284 ZIP codes in Connecticut that have this figure . 06353 ranks 1st at 12.4, against 37.7 in 50th place.

Other rankings for Connecticut

Cite this page

zipcodes.pro. “ZIP Codes With the Youngest Population in Connecticut.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/ct/youngest

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