| population | |
| Broxbourne District | 96779 |
| City and District of St. Albans | 146282 |
| Dacorum District | 152692 |
| East Hertfordshire District | 146309 |
| population | |
| Hertsmere District | 103528 |
| North Hertfordshire District | 132747 |
| Stevenage District | 87081 |
| Three Rivers | 92533 |
| population | |
| Watford District | 96773 |
| Welwyn Hatfield | 121996 |
 | London Luton Airport | ~ 9.34 km |
| RAF Northolt | ~ 33.26 km |
| London Stansted Airport | ~ 33.80 km |
| London City Airport | ~ 42.11 km |
| London Heathrow Airport | ~ 42.90 km |
| Wycombe Air Park | ~ 45.68 km |
| Cambridge Airport | ~ 50.53 km |
| RAF Wyton | ~ 59.06 km |
| London Biggin Hill Airport | ~ 59.19 km |
