There are 46 zip codes in Fairfield County, Connecticut. The most populated is 6902, located in Stamford. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
690273,238Stamford
681054,957Danbury
660654,125Bridgeport
648441,206Shelton
682436,969Fairfield
661136,922Trumbull
661436,184Stratford
685432,228Norwalk
681131,170Danbury
660428,264Bridgeport
685128,217Norwalk
688027,331Westport
660525,860Bridgeport
687725,059Ridgefield
683024,881Greenwich
661022,165Bridgeport
682021,571Darien
684020,709New Canaan
682520,565Fairfield
680120,406Bethel
690520,201Stamford
685019,286Norwalk
646818,851Monroe
689718,473Wilton
680417,797Brookfield
661516,252Stratford
647015,511Newtown
683114,681Greenwich
681213,596New Fairfield
690313,266Stamford
648211,830Sandy Hook
660810,923Bridgeport
688310,336Weston
690610,057Stamford
69019,599Stamford
69078,948Stamford
68968,747Redding
68788,303Riverside
68708,096Old Greenwich
68558,085Norwalk
68077,641Cos Cob
66127,630Easton
66077,133Bridgeport
68904,443Southport
67843,515Sherman
68533,160Norwalk
showing: 46 rows

Zip Codes in Fairfield County, Connecticut by Population (2024)