Southwold is a seaside town and civil parish on the North Sea, in the East Suffolk district, in the county of Suffolk, England. It lies at the mouth of the River Blyth in the Suffolk Coast and Heaths Area of Outstanding Natural Beauty, 11 miles (18 km) south of Lowestoft, 29 miles (47 km) north-east of Ipswich and 97 miles (156 km) north-east of London, within the parliamentary constituency of Suffolk Coastal. At the 2021 Census, the population was 950.

East Suffolk is a local government district in Suffolk, England. The largest town is Lowestoft, which contains Ness Point, the easternmost point of the United Kingdom. The second largest town is Felixstowe, which has the country's largest container port. On the district's south-western edge it includes parts of the Ipswich built-up area. The rest of the district is largely rural, containing many towns and villages, including several seaside resorts. Its council is based in the village of Melton. The district was formed in 2019 as a merger of the two previous districts of Suffolk Coastal and Waveney. In 2021 it had a population of 246,058. It is the most populous district in the country not to be a unitary authority.