Somerleyton, Ashby and Herringfleet is a civil parish in the north of the English county of Suffolk. It is 5 miles (8.0 km) north-west of Lowestoft and the same distance south-west of Great Yarmouth and is in the East Suffolk district. The parish is made up of the villages of Somerleyton, Ashby and Herringfleet and at the 2011 United Kingdom census had a population of 427.

Somerleyton is a village and former civil parish, now in the parish of Somerleyton, Ashby and Herringfleet, in the East Suffolk district, in the north of the English county of Suffolk. It is 4.5 miles (7.2 km) north-west of Lowestoft and 5.5 miles (8.9 km) south-west of Great Yarmouth. The village is closely associated with Somerleyton Hall and was largely rebuilt as a model village in the 19th century at the direction of Samuel Morton Peto. The parish was combined with Herringfleet and Ashby to create the parish of "Somerleyton, Ashby and Herringfleet" on 1 April 1987.