Lokalisering Comté non-métropolitain Hertfordshire : Land Storbritannien, Nation England.
Storbyer : St Albans, Hemel Hempstead, Stevenage, Watford, Welwyn Garden City, Cheshunt, Hoddesdon, Bishop's Stortford, Hatfield, Elstree and Borehamwood, Hitchin, Letchworth Garden City, Harpenden, Hertford, Bushey, Rickmansworth, Potters Bar, Ware, Berkhamsted, Royston, Tring, Baldock, Sawbridgeworth, Buntingford, Aldbury, Bovingdon, Chipperfield, Flamstead, Flaunden, Great Gaddesden, Kings Langley, Little Gaddesden, Markyate, Nash Mills, Nettleden with Potten End, Northchurch, Tring Rural, Wigginton, Albury og Anstey.
Disponible oplysninger : Antal indbyggere, Areal, Højde og Klima.
