| Country: | GBR |
| Type: | A |
| Route: | 51 |
| Image Notes: | The A51 in Boughton looking towards Chester |
| Map Custom: | yes |
| Length Mi: | 79 |
| Direction A: | Northwest |
| Terminus A: | A5268 road Chester 52.5586°N -1.6808°W |
| Direction B: | Southeast |
| Terminus B: | Kingsbury 53.1921°N -2.8821°W |
| Established: | 1922 |
| Maint: | Cheshire East Council Cheshire West and Chester Council Shropshire Council Staffordshire County Council Warwickshire County Council |
| Counties: | Cheshire, Shropshire, Staffordshire, Warwickshire |
| Destinations: | Chester Nantwich Rugeley Lichfield Tamworth |
| Previous Type: | A |
| Previous Route: | 50 |
| Next Type: | A |
| Next Route: | 52 |
The A51 is a road in England which runs for 85 miles (137 km) from Chester, Cheshire to Kingsbury, North Warwickshire.
It takes on the following route:
Originally the A51 terminated at Two Gates where it met the A5, the road south continuing as the A423. When the A423 was removed north of Coventry, the A51 was extended to meet the A47 (now B4114). It was cut back to Kingsbury when the A47 was downgraded.