IP18 postcode district

IP18 holds 295 live postcodes around Southwold, in East Suffolk.

Towns and villages with their centre in IP18

#	Place	County / council	Population
1	Southwold	Suffolk	3,680
2	Walberswick	Suffolk	380

Wards

Westminster constituency

Every IP18 postcode falls in Suffolk Coastal.

Deprivation

The middle postcode here sits in decile 7 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 0% of this district's postcodes sit in the most deprived three deciles, 0% in the least deprived three.

Deprivation deciles describe the LSOA neighbourhood each postcode sits in, weighted by postcodes rather than by people, because the postcode file carries no population. A district where the deprived neighbourhoods are densely populated will read better here than it would per resident.

Neighbouring districts in the IP area

IP1 · IP2 · IP3 · IP4 · IP5 · IP6 · IP7 · IP8 · IP9 · IP10 · IP11 · IP12 · IP13 · IP14 · IP15 · IP16 · IP17 · IP19 · IP20 · IP21 · IP22 · IP23 · IP24 · IP25 · IP26 · IP27 · IP28 · IP29 · IP30 · IP31 · IP32 · IP33 · IP98

Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.