- Watford ( 125,707 )
- Hemel Hempstead ( 85,629 )
- Stevenage ( 84,651 )
- St Albans ( 84,561 )
- Cheshunt ( 57,374 )
- Bishop's Stortford ( 45,001 )
- Welwyn Garden City ( 44,725 )
- Hoddesdon ( 35,174 )
- Letchworth Garden City ( 33,955 )
- Hitchin ( 33,830 )
- Letchworth Garden City ( 33,600 )
- Borehamwood ( 32,176 )
- Harpenden ( 28,966 )
- Hatfield ( 27,883 )
- Hertford ( 25,847 )
- Ware ( 17,576 )
- Bushey ( 17,380 )
- Berkhamstead ( 16,243 )
- Royston ( 14,895 )
- Broxbourne ( 13,298 )
- Tring ( 12,099 )
- Rickmansworth ( 12,043 )
- Chorleywood ( 11,917 )
- Codicote ( 10,938 )
- Abbots Langley ( 10,472 )
- Baldock ( 10,086 )
- Waltham Cross ( 10,000 )
- Sawbridgeworth ( 8,400 )
- Radlett ( 8,213 )
- Kings Langley ( 7,230 )
- Flamstead ( 6,900 )
- Buntingford ( 4,927 )
- Redbourn ( 4,784 )
- Bovingdon ( 4,698 )
- Cuffley ( 4,402 )
- Knebworth ( 4,168 )
