List of all settlements:
- Aldbury, Hertfordshire
- Ashwell, Hertfordshire
- Aston, Hertfordshire
- Baldock, Hertfordshire
- Barkway, Hertfordshire
- Barley, Hertfordshire
- Bedmond, Hertfordshire
- Benington, Hertfordshire
- Berkhamsted, Hertfordshire
- Bishop's Stortford, Hertfordshire
- Blackmore End, Hertfordshire
- Borehamwood, Hertfordshire
- Bovingdon, Hertfordshire
- Braughing, Hertfordshire
- Breachwood Green, Hertfordshire
- Brookmans Park, Hertfordshire
- Buntingford, Hertfordshire
- Bushey, Hertfordshire
- Champneys College, Hertfordshire
- Cheshunt, Hertfordshire
- Chipperfield, Hertfordshire
- Chorleywood, Hertfordshire
- Colney Heath, Hertfordshire
- Cuffley, Hertfordshire
- Dane End, Hertfordshire
- Datchworth, Hertfordshire
- Elstree, Hertfordshire
- Essendon, Hertfordshire
- Flamstead, Hertfordshire
- Furneux Pelham, Hertfordshire
- Great Amwell, Hertfordshire
- Great Offley, Hertfordshire
- Hadham Cross, Hertfordshire
- Harpenden, Hertfordshire
- Hatfield, Hertfordshire
- Hemel Hempstead, Hertfordshire
- Hertford, Hertfordshire
- Hertford Heath, Hertfordshire
- Hitchin, Hertfordshire
- Hoddesdon, Hertfordshire
- How Wood, Hertfordshire
- Hunsdon, Hertfordshire
- Ickleford, Hertfordshire
- Kimpton, Hertfordshire
- Knebworth, Hertfordshire
- Lea Valley, Hertfordshire
- Letchworth Garden City, Hertfordshire
- Little Berkhamsted, Hertfordshire
- Little Gaddesden, Hertfordshire
- Little Wymondley, Hertfordshire
- Long Marston, Hertfordshire
- Maple Cross, Hertfordshire
- Markyate, Hertfordshire
- Northaw, Hertfordshire
- Northwood, Hertfordshire
- Oaklands, Hertfordshire
- Park Street, Hertfordshire
- Perry Green, Hertfordshire
- Pirton, Hertfordshire
- Potten End, Hertfordshire
- Potters Bar, Hertfordshire
- Puckeridge, Hertfordshire
- Radlett, Hertfordshire
- Redbourn, Hertfordshire
- Rickmansworth, Hertfordshire
- Royston, Hertfordshire
- Sarratt, Hertfordshire
- Shenley, Hertfordshire
- South Mimms, Hertfordshire
- St Albans, Hertfordshire
- St Margarets, Hertfordshire
- Stevenage, Hertfordshire
- Tewin, Hertfordshire
- Thundridge, Hertfordshire
- Tring, Hertfordshire
- Walkern, Hertfordshire
- Waltham Cross, Hertfordshire
- Ware, Hertfordshire
- Watford, Hertfordshire
- Watton-at-Stone, Hertfordshire
- Welham Green, Hertfordshire
- Welwyn, Hertfordshire
- Welwyn Garden City, Hertfordshire
- Weston, Hertfordshire
- Wheathampstead, Hertfordshire
- Whitwell, Hertfordshire
- Widford, Hertfordshire
- Wigginton, Hertfordshire