Nacton is a village and civil parish in the East Suffolk district of Suffolk, England. The parish is bounded by the neighbouring parishes of Levington to the east and Bucklesham to the north. It is located between the towns of Ipswich and Felixstowe.

Nacton abuts the River Orwell opposite the village of Pin Mill. Riverside features covered by this parish are (from east to west) Buttermans Bay, Potter's Point, Downham Reach, Mulberry Middle, and Pond Oose.

Nacton parish is the mother for the villages of Levington and Bucklesham and was sufficiently large to have a workhouse, on the remains of which a substantial house was built. This was used by Amberfield School as its main building until it closed in 2011. The more adventurous explorer can find the old burial ground opposite the entrance to a lane leading down to the school. The site of Alnesbourne Priory is close to Nacton.

The village contains one of the few remaining active wildfowl decoys in East Anglia.

The name means Hnaki or Nokkvi's homestead. In 1010, Ulfcytel, Ealdorman of East Anglia, fought the Danes in the area now called Seven Hills (there were more than seven barrows at one time), which is now mostly under junction 58 of the A14.

A country house in the parish, Broke Hall, was the seat of the Broke family, including Admiral Sir Philip Broke.

A former public house, the Anchor, appears to have been closed in controversial circumstances during the late 19th century.

From 1877 to 1959, the village was served by the Orwell station.