- Abbots Langley
- Adeyfield
- Albury
- Aldbury
- Aldenham
- Amwell
- Ansells End
- Anstey
- Apsley
- Apsley
- Ardeley
- Ashridge
- Ashwell
- Aspenden
- Aston End
- Astrope
- Ayot Green
- Ayot St Lawrence
- Ayot St Peter
- Babbs Green
- Bakers End
- Baldock
- Baldock
- Ballingdon Bottom
- Barkway
- Barley
- Barleycroft End
- Barnet
- Batchworth
- Batford
- Bayford
- Bayfordbury
- Beane
- Bedmond
- Bell Bar
- Belsize
- Benington
- Bennetts End
- Berkhamsted
- Berkhamsted
- Birch Green
- Bishops Stortford
- Bishops Stortford
- Borehamwood
- Borehamwood
- Bourne End
- Bovingdon
- Bower Heath
- Boxmoor
- Bozen Green
- Bragbury End
- Bramfield
- Braughing
- Braughing Friars
- Brent Pelham
- Brickendon
- Bricket Wood
- Bridens Camp
- Brookmans Park
- Broxbourne
- Broxbourne
- Buckland
- Buntingford
- Buntingford
- Burnham Green
- Bury Green
- Bushey
- Bushey
- Bushey Heath
- Bygrave
- Caldecote
- Chapmore End
- Charlton
- Chaulden
- Cherry Green
- Cheshunt
- Cheshunt
- Chipperfield
- Chiswell Green
- Chorleywood
- Clothall
- Codicote
- Codicote
- Cold Christmas
- Cole Green
- Colliers End
- Colney Heath
- Colney Street
- Cottered
- Cow Roast
- Croxley Green
- Cuffley
- Dane End
- Datchworth
- Datchworth
- Denham
- Digswell
- Dudswell
- East Cote
- Eastbury
- Eastwick
- Elstree
- Elstree
- Enfield
- Epping Green
- Essendon
- Felden
- Fields End
- Flamstead
- Flaunden
- Frithsden
- Furneaux Pelham
- Gaddesden Row
- Gadebridge
- Garston
- Gerrards Cross
- Gilston
- Goffs Oak
- Gosmore
- Graveley
- Great Amwell
- Great Gaddesden
- Great Hallingbury
- Great Hormead
- Great Munden
- Great Offley
- Great Wymondley
- Green End
- Gubblecote
- Hadham Ford
- Harefield
- Harpenden
- Harpenden
- Harrow
- Hastoe
- Hatfield
- Hatfield
- Hatfield Broad Oak
- Hemel Hempstead
- Hemel Hempstead
- Heronsgate
- Hertford
- Hertford
- Hertford Heath
- Hertingfordbury
- Hertingfordbury
- Hexton
- High Cross
- High Wych
- Highfield
- Hillingdon
- Hinxworth
- Hinxworth
- Hitchin
- Hitchin
- Hoddesdon
- Holwell
- How Wood
- Hunsdon
- Hunton Bridge
- Ickenham
- Ickleford
- Jersey Farm
- Kelshall
- Kensworth
- Kimpton
- Kings Langley
- Kings Langley
- Kings Walden
- Kinsbourne Green
- Knebworth
- Knebworth
- Langley
- Langleybury
- Leavesden
- Lemsford
- Letchmore Heath
- Letchworth Garden City
- Letchworth Garden City
- Leverstock Green
- Lilley
- Little Amwell
- Little Berkhamsted
- Little Gaddesden
- Little Hadham
- Little Hallingbury
- Little Hormead
- Little Munden
- Little Offley
- Little Wymondley
- Little Wymondley
- London Colney
- London Stansted Airport
- Long Marston
- Loudwater
- Maple Cross
- Markyate
- Markyate
- Marshalswick
- Melbourn
- Micklefield Green
- Mill End
- Moor Park
- Much Hadham
- Napsbury
- Napsbury Park
- Nash Mills
- Nasty
- Nettleden
- New Mill
- Newgate Street
- Newnham
- North Mymms
- Northaw
- Northchurch
- Northwood
- Norton
- Nuthampstead
- Oaklands
- Offley
- Old Hall Green
- Old Hatfield
- Old Knebworth
- Oxhey
- Oxhey
- Oxhey Village
- Park Street
- Piccotts End
- Pimlico
- Pinner
- Pirton
- Potten End
- Potters Bar
- Preston
- Puckeridge
- Puttenham
- Radlett
- Radlett
- Radwell
- Redbourn
- Redbourn
- Reed
- Rickmansworth
- Rickmansworth
- Ridge
- Ringshall
- Roe Green
- Royston
- Ruislip
- Rush Green
- Rushden
- Sacombe
- Sacombe Green
- Sandon
- Sandridge
- Sarratt
- Sawbridgeworth
- Sawbridgeworth
- Seer Green
- Sheering
- Shenley
- Shenleybury
- Smallford
- South Mimms
- South Mimms
- South Oxhey
- Spellbrook
- St Albans
- St Albans
- St Ippolyts
- St Pauls Walden
- St Stephen
- Staines Green
- Standon
- Standon Green End
- Stanmore
- Stanstead Abbotts
- Stanstead Airport
- Stanstead St Margarets
- Stansted
- Stapleford
- Stevenage
- Stevenage
- Stocking Pelham
- Stoke Poges
- Takeley
- Tewin
- Therfield
- Thorley
- Thundridge
- Tonwell
- Tring
- Tring
- Tring Station
- Trowley Bottom
- Uxbridge
- Wadesmill
- Walkern
- Wallington
- Walsworth
- Waltham Cross
- Ware
- Ware
- Wareside
- Warners End
- Water End
- Waterford
- Watford
- Watford
- Watton At Stone
- Welham Green
- Well End Wellpond Green
- Welwyn
- Welwyn
- Welwyn Garden City
- Welwyn Garden City
- West Hyde
- Westmill
- Weston
- Westwick Row
- Wheathampstead
- Whempstead
- Whitwell
- Widford
- Wigginton
- Wigginton
- Willian
- Wilstone
- Woodhall Farm
- Woollensbrook
- Woolmer Green
- Wormley
- Wyddial