1. County of Hertfordshire (51.83N, 0.25W) Hertfordshire, First-order Administrative Division 2. Hartfordshire (51.83N, 0.25W) Hertfordshire, First-order Administrative Division 3. Hertford (51.83N, 0.25W) Hertfordshire, First-order Administrative Division 4. Hertfordshire (51.83N, 0.25W) Hertfordshire, First-order Administrative Division 5. Herts (51.83N, 0.25W) Hertfordshire, First-order Administrative Division |