Lokalisering Comté non-métropolitain Hertfordshire : Land Storbritannien, Nation England.
Stora städer : 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 och Rushden.
Tillgänglig information : Invånarantal, Yta, Höjd ö.h. och Klimat.
