|Maintained by||Environment Agency|
|Length||34.59 m (113 ft 6 in) |
|Width||4.59 m (15 ft 1 in)|
|Fall||1.11 m (3 ft 8 in)|
|Above sea level||223'|
Grafton Lock is a lock on the River Thames in Oxfordshire, England. It is on the northern bank between Kelmscott and Radcot, about 1 mile (1.6 km) south of the hamlet of Grafton. The lock was built by the Thames Conservancy in 1896.
The weir is on the other side of the lock island at the upstream end.
There was previously a weir with a flash lock on the site known variously as Day's, East, New Lock or Lower Hart's. The name Lower Hart's was to avoid confusion with another Hart's Weir upstream which was eventually replaced by Eaton Footbridge in 1936.
The Thames Conservancy removed the weir in 1869. The first suggestion for a permanent pound lock was made in 1892, four years before it opened.
Access to the lock
The lock can be reached on foot along the river or by road on a turning off Langley Lane which connects to the A4095.
Reach above the lock
Further upstream the river is crossed by Eaton Footbridge There are moorings at this point reflecting the history of the site which had a weir and flash lock until 1936.
The Thames Path follows the northern bank to Buscot Lock.
|Next lock upstream||River Thames||Next lock downstream|
5.37 km (3.34 mi) 
2.98 km (1.85 mi)
- "Environment Agency Dimensions of locks on the River Thames". web page. Environmental Agency. 8 November 2012. Retrieved 17 November 2012. Dimensions given in metres
- Thacker 1968, p. 50.
- "Environment Agency Distances between locks on the River Thames". web page. Environmental Agency. 8 November 2012. Retrieved 19 November 2012. Dimensions given in metres
- Thacker, Fred. S. (1968) . The Thames Highway. II: Locks and Weirs. Newton Abbott: David & Charles. pp. 13, 45, 49–52, 84. SBN 7153-4233-9.
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