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| County : | Middlesex County |
| State : | Connecticut (CT) |
| Land Area : | 369.30 sq mi |
| Water Area : | 69.76 sq mi |
| Latitude : | 41.4345251 |
| Longitude : | -72.5242267 |
| Population (2010): | 165,676 |
| Population Estimate (2012) : | 165,639 |
| Population Density : | 448.62/sq mi |
| Housing Units (2012) : | 74,837 |
| Median Household Income (2012) : | $76,659 (Connecticut : $69,519, USA : $53,046) |
| Median Family Income (2012) : | $96,610 (Connecticut : $87,182, USA : $64,585) |
| Median House Price (2012) : | $299,600 (Connecticut : $285,900, USA : $181,400) |
Middlesex County Cities / Towns
| Chester Center (1,558) | Clinton (3,368) | Deep River Center (2,484) |
| Durham (2,933) | East Hampton (2,691) | Essex Village (2,495) |
| Fenwick Borough (43) | Higganum (1,698) | Lake Pocotopaug (3,436) |
| Middletown City (47,648) | Moodus (1,413) | Old Saybrook Center (2,039) |
| Portland (5,862) | Saybrook Manor (1,052) | Westbrook Center (2,413) |
Middlesex County Zip Codes
| 06409 (693) | 06412 (3,994) | 06413 (13,235) |
| 06414 (214) | 06415 (16,857) | 06416 (14,005) |
| 06417 (4,629) | 06419 (6,525) | 06420 (4,182) |
| 06422 (7,388) | 06423 (5,097) | 06424 (12,808) |
| 06426 (3,245) | 06438 (2,550) | 06441 (5,438) |
| 06442 (2,745) | 06455 (3,148) | 06456 (295) |
| 06457 (47,648) | 06469 (3,209) | 06475 (10,242) |
| 06480 (9,508) | 06481 (1,277) | 06498 (6,963) |