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  5. Area Code 203

Where Is Area Code 203?

Area code 203 is found in the US state of Connecticut. Primarily servicing the city of Bridgeport (population: 146866), area code 203 covers 3 counties of Connecticut.

Located in the Eastern time zone, area code 203 is on the same time as New York, NY.

Area code 203 was brought into effect on January 1, 1947.

Map of  with area code 203 highlighted

Counties in Area Code 203

  • Fairfield,
  • Litchfield,
  • New Haven.

Most Populous Cities in Area Code 203

City County City Population Time Zone
Bridgeport Fairfield 146,866 EST
New Haven New Haven 128,981 EST
Stamford Fairfield 124,755 EST
Waterbury New Haven 110,411 EST
Norwalk Fairfield 87,004 EST
Danbury Fairfield 82,381 EST
Hamden New Haven 60,988 EST
Meriden New Haven 60,935 EST
Fairfield Fairfield 56,042 EST
West Haven New Haven 55,585 EST
Milford New Haven 52,778 EST
Stratford Fairfield 52,334 EST
Wallingford New Haven 45,258 EST
Shelton Fairfield 40,292 EST
Greenwich Fairfield 39,538 EST
Trumbull Fairfield 36,760 EST
Naugatuck New Haven 31,987 EST
East Haven New Haven 29,872 EST
Cheshire New Haven 29,172 EST
Branford New Haven 27,870 EST
Westport Fairfield 27,141 EST
Ridgefield Fairfield 25,134 EST
North Haven New Haven 24,397 EST
Guilford New Haven 22,383 EST
Darien Fairfield 21,116 EST

Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.

View all United States Area Codes.

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This page was last modified on July 3, 2015.