- Keady, Co. Armagh
- Kearsley, Greater Manchester
- Kegworth, Leicestershire
- Keith, Moray
- Kelloholm, Dumfries and Galloway
- Kelso, Scottish Borders
- Kendal, Cumbria
- Kenilworth, Warwickshire
- Kensington, Kensington and Chelsea
- Kenton, Harrow
- Keswick, Cumbria
- Kettering, Northamptonshire
- Keynsham, Somerset
- Keyworth, Nottinghamshire
- Kidderminster, Worcestershire
- Kidwelly, Carmarthenshire
- Kilbarchan, Renfrewshire
- Kilbirnie, North Ayrshire
- Kilkeel, Co. Down
- Killinchy, Co. Down
- Killyleagh, Co. Down
- Kilrea, Co. Londonderry
- Kilsyth, North Lanarkshire
- Kimberley, Nottinghamshire
- King's Lynn, Norfolk
- Kings Langley, Hertfordshire
- Kings Norton, West Midlands
- Kingsbridge, Devon
- Kingsbury, Barnet
- Kingsteignton, Devon
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- Kingston Upon Thames, Kingston Upon Thames
- Kingston Upon Hull, Kingston Upon Hull
- Kingswood, South Gloucestershire
- Kington, Herefordshire
- Kingussie, Highland
- Kinlochleven, Highland
- Kinlochmore, Highland
- Kinross, Perth and Kinross
- Kinver, Staffordshire
- Kircubbin, Co. Down
- Kirk Ella, East Riding Of Yorkshire
- Kirkburton, West Yorkshire
- Kirkby In Ashfield, Nottinghamshire
- Kirkby Lonsdale, Cumbria
- Kirkby Stephen, Cumbria
- Kirkcaldy, Fife
- Kirkconnel, Dumfries and Galloway
- Kirkcudbright, Dumfries and Galloway
- Kirkham, Lancashire
- Kirkintilloch, East Dunbartonshire
- Kirriemuir, Angus
- Kiveton Park, South Yorkshire
- Knaresborough, North Yorkshire
- Knebworth, Hertfordshire
- Knighton, Powys
- Knottingley, West Yorkshire
- Knowle, West Midlands
- Knutsford, Cheshire
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