I
- Ianstown, Moray
- Ibberton
- Ibrox
- Ibsley, Hampshire
- Ibstock
- Ibstone
- Ibthorpe, Hampshire
- Ibworth
- Ickburgh
- Ickenham
- Ickford
- Ickham
- Ickleford
- Icklesham
- Ickleton
- Icklingham
- Ickornshaw, North Yorkshire
- Icomb
- Idbury
- Iddesleigh
- Ide
- Ideford, Devon
- Ide Hill
- Iden
- Iden Green
- Ides Common
- Idle
- Idle Moor
- Idless
- Idlicote
- Idmiston
- Idole
- Idridgehay
- Idrigil
- Idstone, Oxfordshire
- Idvies
- Iffley, Oxfordshire
- Ifield
- Ifold
- Iford
- Ifton Heath, Shropshire
- Ightfield
- Ightfield Heath
- Iken
- Ilam
- Ilchester
- Ilderton
- Ilford
- Ilford
- Ilfracombe
- Ilkeston
- Ilketshall
- Ilketshall Saint Andrew, Suffolk
- Ilketshall St. John
- Ilketshall St. Lawrence
- Ilketshall St. Margaret
- Ilkley
- Illand
- Illey, Dudley
- Illington
- Illingworth
- Illogan
- Illston
- Ilmer
- Ilmington
- Ilminster
- Ilsington
- Ilston
- Ilton
- Ilton
- Imachar, North Ayrshire
- Imber, Wiltshire
- Imeroo
- Immingham
- Immingham Dock
- Ince
- Ince Blundell
- Ince Castle
- Ince-in-Makerfield
- Inch
- Inchbae Lodge, Highland
- Inchbare
- Inchberry
- Inch, Dumfries and Galloway
- Inches
- Inchinnan
- Inchintown
- Inchlaggan
- Inchlumpie
- Inchmarlo, Aberdeenshire
- Inchmill, Angus
- Inchnabobart
- Inchnadamph
- Inchree
- Inchrory
- Inchture
- Inchvuilt
- Inchyra
- Indian Queens
- Ine
- Ingarsby
- Ingatestone
- Ingbirchworth
- Ingerthorpe
- Ingestre
- Ingham
- Ingham
- Ingham
- Ingleborough, North Yorkshire
- Ingleby
- Ingleby Arncliffe
- Ingleby Barwick
- Ingleby, North Yorkshire
- Ingleigh Green
- Inglesbatch
- Inglesham
- Ingleton
- Ingleton
- Inglewhite
- Inglewood
- Inglewood Bank
- Inglismaldie
- Ingliston
- Ingmanthorpe
- Ingmire Hall
- Ingoe
- Ingol
- Ingoldisthorpe, Norfolk
- Ingoldmells
- Ingoldsby
- Ingon
- Ingram
- Ingrams Green
- Ingrave, Essex
- Ingrow
- Ings
- Ingsdon
- Ingst
- Ingworth
- Inishmore
- Inkberrow
- Inkersall
- Inkhorn
- Inkpen
- Inkpen Common
- Inkstack
- Innellan
- Inner Hope, Devon
- Innerleith
- Innerleithen
- Innermessan
- Innerpeffray
- Innerwick
- Innerwick
- Innsworth
- Insch
- Insh
- Inshes
- Inshore
- Inskip
- Instow
- Intack
- Intake
- Interchange Park
- Intwood
- Inver
- Inver
- Inver
- Inver, Aberdeenshire
- Inverailort
- Inveralligin, Highland
- Inverallochy
- Inveralmond
- Inveran
- Inveraray
- Inverardoch Mains
- Inverarity
- Inverarnan
- Inverasdale, Highland
- Inverawe
- Inverbeg
- Inverbervie
- Inverboyndie
- Inverbroom, Highland
- Inverbrough
- Invercannich, Highland
- Invercassley
- Inverchaolain
- Inverchapel, Argyll and Bute
- Invercharnan
- Inverchorachan
- Invercoe, Highland
- Inverdruie, Highland
- Inverebrie
- Invereen
- Invereighty
- Inverernan, Aberdeenshire
- Invererne
- Inverey
- Inverfarigaig
- Invergarry
- Invergelder, Aberdeenshire
- Invergeldie
- Invergloy
- Invergordon
- Invergowrie
- Inverguseran, Highland
- Inverhadden, Perth and Kinross
- Inverharity, Angus
- Inverherive
- Inverhope
- Inverie
- Inverinan
- Inverinan Beag, Argyll and Bute
- Inverinate
- Inverkeilor
- Inverkeithing
- Inverkeithny
- Inverkip
- Inverkirkaig
- Inverlael
- Inverlaidnan, Highland
- Inverlair
- Inverlauren
- Inverliver
- Inverlochlarig
- Inverlochrie
- Inverlochy
- Inver Mallie
- Invermay
- Invermearan, Perth and Kinross
- Invermoriston
- Invernaver, Highland
- Inverness
- Invernoaden
- Inveroran Hotel
- Inverquharity
- Inverquhomery
- Inversanda, Highland
- Invershiel
- Invershin
- Inversnaid
- Inversnaid Hotel
- Invertrossachs
- Inverugie
- Inverugie Mill, Aberdeenshire
- Inveruglas
- Inverurie
- Invicta Park
- Inwardleigh
- Inworth
- Iping, West Sussex
- Ipplepen
- Ippollitts, Hertfordshire
- Ipsden
- Ipstones
- Ipswich
- Irby
- Irby
- Irby in the Marsh
- Irby upon Humber, North East Lincolnshire
- Irchester
- Ireby
- Ireby
- Ireland
- Ireland
- Ireland
- Ireleth, Cumbria
- Ireshopeburn
- Ireton Wood, Derbyshire
- Irish Omerbane, Ballymena
- Irish Town, Omagh
- Irlam
- Irnham
- Iron Acton
- Ironbridge
- Iron Cross
- Irongray
- Ironside
- Irstead
- Irthington
- Irthlingborough
- Irton
- Irton
- Irvine
- Irvinestown
- Isbister
- Isbister
- Isbister
- Iscoyd
- Isel
- Isfield
- Isham
- Ishriff
- Island Gardens
- Islawrdref
- Isle Abbotts
- Islebeck
- Isle Brewers
- Isleham
- Isle of Benbecula
- Isle of Canna
- Isle of Eigg
- Isle of Gigha
- Isle Of Lewis
- Isle of Muck
- Isle of Mull
- Isle of Scalpay
- Isle of Whithorn
- Isleornsay
- Islesburgh
- Isleworth
- Isley Walton
- Islington
- Islington
- Islington
- Islington
- Islip
- Islip
- Islivig
- Ismere
- Istead Rise
- Itchen
- Itchen Abbas, Hampshire
- Itchenor
- Itchen Stoke
- Itchingfield
- Itchington
- Itteringham
- Itton
- Ivegill
- Iver
- Iver Heath
- Iverley
- Iveston
- Ivinghoe
- Ivinghoe Aston
- Ivington
- Ivybridge
- Ivychurch
- Ivy Cross
- Ivy Hatch
- Ivyleaf Hill
- Ivy Todd
- Iwade
- Iwerne Courtney
- Iwerne Minster
- Iwood
- Ixworth
- Ixworth Thorpe