South West
I
- Ibberton
- Ibsley
- Icelton
- Iddesleigh
- Iddlecott
- Ide
- Ideford
- Idless
- Idmiston
- Iford, South West
- Iford, Bath and North East Somerset
- Iford, Wiltshire
- Ilchester
- Ilchester Mead
- Ilford, Somerset
- Ilford Bridges
- Ilfracombe
- Ilkerton East
- Illand
- Illogan
- Illogan Downs
- Illogan Highway
- Ilminster
- Ilton, South West
- Inchbrook
- Indian Queen
- Ingleigh Green
- Inglesbatch
- Ingst
- Inn's Court
- Inner Hope
- Innis Downs
- Innox Hill
- Innsworth
- Instow
- Instow Town
- Insworke
- Inwardleigh
- Ipplepen
- Ireland, Cornwall
- Ireland, Wiltshire
- Ireland, Little
- Iron Acton
- Isaac, Port
- Isle Abbotts
- Isle Brewers
- Isles of Scilly
- Itchington
- Itlay
- Itton, West Devon
- Ivory Hill
- Ivy Cross
- Ivy Mead
- Ivy Thorn Hill
- Ivybridge
- Iwerne Minster
- Iwood