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, Graveley, Reed, Radwell, Preston, Pirton, Offley, Nuthampstead, Newnham, Lilley, Chipperfield, Langley, Knebworth, Codicote, King's Walden, Caldecote og Rushden.
Disponible oplysninger : Antal indbyggere, Areal, Højde og Klima.
