According to a publication by the 2010 Census, Westport has a total area of of which (59.67%) is land with the remaining area of (40.20%) water. Westport is bordered by
Norwalk on the west,
Weston to the north,
Wilton to the northwest,
Fairfield to the east and
Long Island Sound to the south.
Climate {{Weather box|location = Westport, Connecticut
Topography Both the train station and a total of 26 percent of town residents live within the 100-year floodplain. The floodplain was breached in 1992 and 1996 resulting in damage to private property, the 1992 flooding of the train station parking lot and the implementation of flood mitigation measures that include town regulations that affect renovations and additions to building within the floodplain zone.
Neighborhoods •
Saugatuck – around the Westport railroad station near the southwestern corner of the town – a built-up area with some restaurants, stores and offices. Saugatuck originates from the Paugussett tribe meaning "mouth of the tidal river." • Saugatuck Shores – a curved peninsula surrounded by the Long Island Sound, this area was once part of the town of Norwalk. Today several hundred residents live on the peninsula, which became part of Westport in the 1960s. • Saugatuck Island – founded in the 1890s as Greater Marsh Shores, the island was renamed Saugatuck Island in 1920 and became a
special taxing district on November 5, 1984. •
Westport Village – The area around Post Road and Main Street on and near the Saugatuck River that serves as the center of Westport, with many shops and restaurants. There has been recent growth in the downtown area, including Levitt Pavilion, and Bedford square, a mixed-use development incorporating the Bedford Mansion. •
Greens Farms – Westport's oldest neighborhood, starting around Hillspoint Road and ending at Westport's boundary on the east side. Greens Farms has its own post office and train station. •
Cockenoe Island (pronounced "KuhKEEnee") – just off the southeastern coast of the town. Cockenoe Island is an uninhabited island that was purchased by Westport for $212,740 from the United Illuminating Company in 1969 so that the company could not use the land to build a nuclear plant. •
Coleytown – Located at the northern edge of town, near the Weston town line. Home to Coleytown fire station, Middle and Elementary school. Named for Farmer Coley, who owned lots of land in this area. •
Compo – Located around the main beach in the town, Compo Beach. Compo (Compaug), can be traced back to the early Paugussett tribe and means ''the bear's fishing ground.'' • SewTrol – The area containing the Town Sewage Treatment Plant, the Town Animal Control, and the State Boat Launch. •
Poplar Plains – The northwest corner of the town, bordered to the southwest by the city of
Norwalk, to the northwest by the town of
Wilton, to the northeast by the town of
Weston, to the east by the
Saugatuck River, and to the south by the
Merritt Parkway. • Staples – The eastern side of the town, bordered to the north by Cross Highway, to the west by Compo Road, to the south by
U.S. Route 1 (Post Road), and to the east by the town of
Fairfield. ==Demographics==