Chester is a town in Middlesex County, Connecticut, United States.

The town is part of the Lower Connecticut River Valley Planning Region.

[2] The town center is defined by the U.S. Census Bureau as a census-designated place (CDP).

[3] The area was home to a Native American (possibly Hammonasset) village named Pattaquonk.

[4] Pattaquonk was also the name and approximate location of a 30-acre Wangunk reservation established in 1662 as part of the English acquisition of the land encompassing Haddam and East Haddam, which was home to three Wangunk villages.

None of the families and 1.3% of the population were living below the poverty line, including no under eighteens and 2.6% of those over 64.

At the 2000 census, there were 1,546 people, 632 households, and 401 families living in the Chester Center CDP.

Chester, like the other two towns in the "tri-town area" (Essex and Deep River), is a member of Regional School District #4.

John Winthrop Junior High School is on Warsaw Street in Deep River, and Valley Regional High School, is on Kelsey Hill in Deep River.

Each town in the area also has their own elementary school, serving grades K–6.

Services include connections to the Old Saybrook Train Station, served by Amtrak and Shoreline East railroads.