| Site name | Country | County | Nearest town | Site type | Access | Classification (girth in metres) | View on map |
|---|---|---|---|---|---|---|---|
| Assolas House | Ireland | Co. Cork | Kanturk | former religious site | No | Ancient 4m-5m, Ancient 5m-7m | View On Map |
| Astbury | England | Cheshire | Congleton | churchyard | Yes | Ancient 7m+ | View On Map |
| Asthall (Leigh) | England | Oxfordshire | Witney | churchyard | Yes | Lost | View On Map |
| Astley – Dam House Yew | England | Greater Manchester | Manchester | garden | Yes | Ancient 4m-5m | View On Map |
| Astley Castle | England | Warwickshire | Nuneaton | historic site | No | Ancient 4m-5m | View On Map |
| Aston Botterell – churchyard | England | Shropshire | Bridgnorth | churchyard | Yes | Lost | View On Map |
| Aston Botterell – field | England | Shropshire | Bridgnorth | field | Yes | Ancient 4m-5m | View On Map |
| Aston le Walls | England | Northamptonshire | Banbury | churchyard | Yes | Ancient 5m-7m | View On Map |
| Aston Rowant – Beacon Hill | England | Oxfordshire | Watlington | woodland | Yes | Notable | View On Map |
| Atworth | England | Wiltshire | Chippenham | churchyard | Yes | Notable | View On Map |
| Ault Hucknall | England | Derbyshire | Mansfield | churchyard | Yes | Notable | View On Map |
| Auvillars | France | Calvados - Normandie | Lisieux | churchyard | Yes | Ancient 5m-7m | View On Map |
| Avenbury | England | Herefordshire | Bromyard | churchyard | No | Notable | View On Map |
| Avenbury – near | England | Herefordshire | Bromyard | footpath/road | Yes | Ancient 4m-5m | View On Map |
| Avening | England | Gloucestershire | Stroud | churchyard | Yes | Ancient 4m-5m, Notable | View On Map |
| Avington – Park Farm | England | Hampshire | Winchester | garden | No | Ancient 5m-7m | View On Map |
| Avondale – Rathdrum | Ireland | Co. Wicklow | Dublin | estate | Yes | Ancient 4m-5m | View On Map |
| Awliscombe | England | Devon | Honiton | churchyard | Yes | Notable | View On Map |
| Awre | England | Gloucestershire | Gloucester | churchyard | Yes | Ancient 7m+ | View On Map |
| Axminster | England | Devon | Honiton | churchyard | Yes | Notable | View On Map |