The English River Thames is navigable from Cricklade or Lechlade to the sea, and this part of the river falls 71 meters (234 feet). There are 45 locks on the river, each with one or more adjacent weirs. These lock and weir combinations are used for controlling the flow of water down the river, most notably when there is a risk of flooding, and provide for navigation above the tideway.
Marsh Lock is a lock and weir situated on the River Thames in England, about 1 mile upstream of Henley Bridge in Henley-on-Thames, Oxfordshire. The lock is close to the Berkshire bank, but accessed from the Oxfordshire side via two long walkways, the downstream one being near Mill Meadows. The first pound lock was built by the Thames Navigation Commission in 1773.
Bray Lock is a lock and weir on the River Thames in England near Bray and Dorney Reach, and is just above the M4 Bridge across the Thames. The lock is on the Buckinghamshire side of the river on the opposite bank from Bray itself and Maidenhead which are in Berkshire. Here, the county line stands roughly halfway between the lock and the opposite bank, following the course of the Thames itself. The pound lock was built by the Thames Navigation Commission relatively late, in 1845. The lock keeper's cottage is on an island between the lock and the weir.
Whitchurch Lock is a lock and weir on the River Thames in England. It is a pound lock, built by the Thames Navigation Commissioners in 1787. It is on an island near the Oxfordshire village of Whitchurch-on-Thames and is accessible only by boat.
Shiplake Lock is a lock and weir situated on the River Thames in England between the villages of Shiplake and Lower Shiplake, Oxfordshire. It is just above the points where the River Loddon joins the Thames and Shiplake Railway Bridge crosses the river. The first pound lock was built by the Thames Navigation Commission in 1773.
Goring Lock is a lock and weir situated on the River Thames in England at the Goring Gap in the Chiltern Hills. The lock is located on the Oxfordshire bank at Goring-On-Thames, with Streatley, Berkshire on the opposite side of the river. It is just upstream of Goring and Streatley Bridge. The lock was first built in 1787 by the Thames Navigation Commissioners
Cookham Lock is a lock with weirs situated on the River Thames near Cookham, Berkshire, about a half-mile downstream of Cookham Bridge. The lock is set in a lock cut which is one of four streams here and it is surrounded by woods. On one side is Sashes Island and on the other is Mill Island connected to Formosa Island, the largest on the non-tidal Thames.
Benson Lock is a lock on the River Thames in England, close to Benson, Oxfordshire but on the opposite bank of the river. The first pound lock here was built by the Thames Navigation Commission in 1788 and it was replaced by the present masonry lock in 1870. The distance between Benson Lock and Cleeve Lock downstream is 6.5 miles (10.4 km) - the longest distance between locks on the River Thames.
Temple Lock is a lock and weir situated on the Buckinghamshire bank of the River Thames near Temple Mill Island opposite Temple Meadows and not far from Hurley, Berkshire. It was first built by the Thames Navigation Commissioners in 1773.
Boveney Lock is a lock on the River Thames situated on the Buckinghamshire bank opposite the Windsor Racecourse and close to Eton Wick. Boveney is a village a little way upstream on the same side. The lock was first built in 1838 by the Thames Navigation Commission. The lock was rebuilt in 1898 closer to the Buckinghamshire bank, and a set of boat rollers were installed on the old site.
Culham Lock is a lock on the River Thames in England close to Culham, Oxfordshire. It is on a lock cut to the north of the main stream, which approaches the large village of Sutton Courtenay. The lock was built of stone by the Thames Navigation Commission in 1809.
Abingdon Lock is a lock on the River Thames in England, less than 1 mile east and upstream of Abingdon, Oxfordshire, on the opposite bank of the river. It was originally built in 1790 by the Thames Navigation Commission.
Osney Lock is a lock on the River Thames in Oxford, England, where the village or island of Osney is next to the river.
Godstow Lock is a lock on the River Thames in Oxfordshire, England. It is between the villages of Wolvercote and Wytham on the outskirts of Oxford. The first lock was built of stone by Daniel Harris for the Thames Navigation Commission in 1790. It is the lock furthest upstream on the river which has mechanical (electro-hydraulic) operation - every lock upstream of Godstow utilises manual beam operation instead.
Eynsham Lock is a lock on the River Thames in England. It is on the southern bank near Swinford Oxfordshire. The large village of Eynsham is a little distance away on the northern bank.
Pinkhill Lock is a lock on the River Thames in England. It is close to Farmoor, Oxfordshire.
Shifford Lock is a lock on the River Thames in England. It is in the centre of a triangle formed by the small villages of Shifford, Duxford and Chimney in Oxfordshire. It is at the start of a navigation cut built with the lock by the Thames Conservancy in 1898. This was the only new lock built on the non-tidal Thames in the era of falling revenue after the Thames Conservancy took over responsibilities of the Thames Navigation Commission. It replaced a flash lock in a weir about 3⁄4 mile (1.2 km) downstream.
Rushey Lock is a lock on the River Thames in England. It is on the northern bank of the river in Oxfordshire, at a considerable distance from any village, the nearest being Buckland Marsh, a hamlet on the road to Buckland to the south of the river.
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.
Buscot Lock is a lock on the River Thames in England, near the village of Buscot, Oxfordshire.
