Lokalizácia Comté non-métropolitain Hertfordshire : Krajina Spojené kráľovstvo, Národ Anglicko.
Hlavné mestá : 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 a Rushden.
Dostupné informácie : Počet obyvateľov, Nadmorská výška, Rozsah a Klíma.