Byram is a neighborhood/section and census-designated place (CDP) in the town of Greenwich in Fairfield County, Connecticut, United States. It had a population of 4,146 at the 2010 census, and a census-estimated population of 4,216 in 2018. An endcap of Connecticut's Gold Coast, Byram is the southernmost point in the town of Greenwich and the U.S. state of Connecticut. It is separated from Port Chester, Westchester County, New York, by the Byram River. Byram was once known as East Port Chester.

Greenwich is a town in southwestern Fairfield County, Connecticut, United States. At the 2020 census, it had a population of 63,518. Greenwich is a principal community of the Bridgeport–Stamford–Norwalk–Danbury metropolitan statistical area, which comprises all of Fairfield County, and is part of the Western Connecticut Planning Region. The town is the southwesternmost municipality in both the State of Connecticut and the six-state region of New England. The town is named after Greenwich, a royal borough of London in the United Kingdom.