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.
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.
This page was last updated on July 3, 2015.