En el condado de Hertfordshire en Inglaterra (Reino Unido), se encuentran las siguientes localidades:
- Aldbury 648
- Ashwell 1,912
- Aston 534
- Baldock 10,640
- Barkway 762
- Barley 687
- Bedmond 986
- Benington 663
- Berkhamsted 21,457
- Bishop's Stortford 39,901
- Blackmore End 880
- Borehamwood 37,232
- Bovingdon 5,276
- Braughing 935
- Breachwood Green 704
- Brookmans Park 3,594
- Buntingford 5,611
- Bushey 26,362
- Champneys College 544
- Cheshunt 47,121
- Chipperfield1,356
- Chorleywood 13,490
- Colney Heath 1,316
- Cuffley 4,443
- Dane End 587
- Datchworth 1,245
- Elstree 2,022
- Essendon 514
- Flamstead 1,061
- Furneux Pelham 564
- Great Amwell1,178
- Great Offley 776
- Hadham Cross 1,250
- Harpenden 30,880
- Hatfield 44,101
- Hemel Hempstead 101,159
- Hertford 28,689
- Hertford Heath 2,741
- Hitchin 36,459
- Hoddesdon 43,925
- How Wood 6,976
- Hunsdon 1,001
- Ickleford 1,863
- Kimpton 1,469
- Knebworth 4,135
- Lea Valley 657
- Letchworth Garden City 34,519
- Little Berkhamsted 520
- Little Gaddesden 617
- Little Wymondley 1,011
- Long Marston 792
- Maple Cross 2,528
- Markyate 3,067
- Northaw 631
- Northwood 5,787
- Oaklands 8,094
- Park Street 2,625
- Pirton 1,298
- Potten End 1,339
- Potters Bar 23,348
- Puckeridge 3,753
- Radlett 8,164
- Redbourn 5,131
- Rickmansworth 25,325
- Royston 16,574
- Sarratt 932
- Sawbridgeworth 10,722
- Shenley 4,334
- South Mimms 911
- St Albans 86,454
- Stevenage 93,222
- St Margarets 3,849
- Tewin 1,024
- Thundridge 721
- Tring 12,206
- Walkern 1,603
- Waltham Cross 10,408
- Ware 19,921
- Watford 140,922
- Watton-at-Stone 2,700
- Welham Green 3,067
- Welwyn 3,823
- Welwyn Garden City 51,735
- Weston 907
- Wheathampstead 4,474
- Whitwell 991
- Widford 571
- Wigginton 810[1]