Old Greenwich is a coastal neighborhood/section and census-designated place in Greenwich in Fairfield County, Connecticut, United States, and is among America's wealthiest communities. As of the 2010 census it had a population of 6,611.
The town of Greenwich is one political and taxing body, but consists of several distinct sections or neighborhoods, such as Byram, Cos Cob, Glenville, Mianus, Old Greenwich, Riverside and Greenwich (sometimes referred to as central, or downtown, Greenwich). Of these neighborhoods, three (Cos Cob, Old Greenwich, and Riverside) have separate postal names and ZIP codes.
One of the founding settlers of Old Greenwich was Elizabeth Fones, niece and daughter-in-law of John Winthrop, founder and Governor of the Massachusetts Bay Colony. What is now called Greenwich Point was known for much of its early history as "Elizabeth Neck" in recognition of Elizabeth (Fones) Feake Hallet and her 1640 purchase of the Point and much of the area now known as Old Greenwich.
The Old Greenwich Railroad Station, originally called the "Sound Beach Railroad Station", built in 1894 and added to the National Register of Historic Places in 1989, serves commuters in the neighborhood. The town's largest beach is on a long, thin peninsula at the southwest end of the neighborhood. The town's local beach is called Tod's Point after a former resident. The beach is now public property, which belongs to the town of Greenwich. Residents can purchase a seasonal beach pass. Non-residents can purchase a one-day pass for $7 per person and $35 per vehicle.