| Key |
 | Accessible open space |
 | Castle open to the public |
 | English Heritage |
 | Historic House open to the public |
 | Museum |
 | National Trust |
| NGS | Private, grounds open under the National Gardens Scheme |
| Name | Usually, but not always, the name of the surviving building - for instance the remains of the historic Bampton Castle were incorporated in a later building known as Ham Court |
| Type | Usually the type of castle represented by the predominant surviving fortified remains |
| Date | Usually the dates of the principal building works relating to the surviving remains |
| Condition | An indication as to what remains of the original castle structure |
| Image | The building or site as it currently exists |
Ownership /Access | Brief information relating to the current ownership or use of the site, an icon signifying that the site is frequently open to the public |
| Notes | Brief description or information of note |