Lokatie Comté non-métropolitain Hertfordshire : Land Verenigd Koninkrijk, Natie Engeland.
Grote steden : 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 en Rushden.
Beschikbare informatie : Bevolking, Oppervlakte, Hoogte en Klimaat.