Area code 203 serves southwestern Connecticut, including major cities such as New Haven, Stamford, and Bridgeport. It was among the first area codes introduced in 1947. Originally covering the entire state, 203 has since been split and overlaid with 475 due to growing demand. The region it covers is a blend of academic, financial, and cultural significance, with Yale University and numerous Fortune 500 companies headquartered nearby. Ten-digit dialing is required in this area. Area code 203 continues to carry historical prestige and is associated with Connecticut’s coastal affluence and Ivy League legacy.
Locations for Area Code - 203
Browse all cities and areas that belong to this area code.
Bridgeport
- State: CT
- Population: 147,629
- Latitude: 41.17923, Longitude: -73.18945
- Elevation: 1 m
Danbury
- State: CT
- Population: 84,657
- Latitude: 41.39482, Longitude: -73.45401
- Elevation: 121 m
East Haven
- State: CT
- Population: 130,322
- Latitude: 41.30815, Longitude: -72.92816
- Elevation: 18 m
Meriden
- State: CT
- Population: 59,988
- Latitude: 41.53815, Longitude: -72.80704
- Elevation: 54 m
Milford
- State: CT
- Population: 130,322
- Latitude: 41.30815, Longitude: -72.92816
- Elevation: 18 m
Naugatuck
- State: CT
- Population: 108,802
- Latitude: 41.55815, Longitude: -73.0515
- Elevation: 82 m
New Haven
- State: CT
- Population: 130,322
- Latitude: 41.30815, Longitude: -72.92816
- Elevation: 18 m
North Haven
- State: CT
- Population: 130,322
- Latitude: 41.30815, Longitude: -72.92816
- Elevation: 18 m
Norwalk
- State: CT
- Population: 88,485
- Latitude: 41.1176, Longitude: -73.4079
- Elevation: 11 m
Shelton
- State: CT
- Population: 41,296
- Latitude: 41.31649, Longitude: -73.09316
- Elevation: 19 m
Stamford
- State: CT
- Population: 128,874
- Latitude: 41.05343, Longitude: -73.53873
- Elevation: 7 m
Stratford
- State: CT
- Population: 51,384
- Latitude: 41.18454, Longitude: -73.13317
- Elevation: 7 m
Trumbull
- State: CT
- Population: 36,018
- Latitude: 41.24287, Longitude: -73.20067
- Elevation: 71 m
Waterbury
- State: CT
- Population: 108,802
- Latitude: 41.55815, Longitude: -73.0515
- Elevation: 82 m
West Haven
- State: CT
- Population: 54,927
- Latitude: 41.27065, Longitude: -72.94705
- Elevation: 10 m
Westport
- State: CT
- Population: 26,391
- Latitude: 41.14149, Longitude: -73.3579
- Elevation: 9 m
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