List of crossings of the River Thames

This is a list of crossings of the River Thames comprising over 200 bridges, 27 tunnels, six public ferries, one cable car link, and one ford. Historic achievements, explanatory notes and proposed crossings are also included.

Barrier and boundary
Until sufficient crossings were established, the river provided a formidable barrier for most of its course— in post-Roman Britain during the Dark Ages Belgic-Celtic tribal lands and Anglo-Saxon kingdoms and subdivisions were defined by which side of the river they were on. When English counties were established, it formed a boundary between the counties on either side. After rising in Gloucestershire, the river flowed between, on the north bank, the historic counties of Oxfordshire, Buckinghamshire, Middlesex and Essex; and on the south bank, the counties of Wiltshire, Berkshire, Surrey, and Kent. However the many permanent crossings that have been built over the centuries have changed the dynamics and made cross-river development and shared responsibilities more practicable. In 1965, on creating a new county of Greater London, the London Borough of Richmond upon Thames incorporated areas that had been part of both Middlesex and Surrey and the Middlesex borough of Spelthorne became part of Surrey. Further changes in 1974 moved some of the boundaries away from the river. For example, much of the north west of Berkshire including Abingdon and Wantage became part of Oxfordshire and some southern parts of Buckinghamshire became part of Berkshire, including Slough, Eton and Wraysbury. Despite these changes, in the sports of rowing and skiffing the banks are still referred to by their traditional county names and in sports such as football and cricket historic county areas are sometimes used.

History of crossings
Many of the present road bridges over the river are on the sites of earlier fords, ferries and wooden structures. The earliest known major crossings of the Thames by the Romans were at London Bridge and Staines Bridge. At Folly Bridge in Oxford the remains of an original Saxon structure can be seen, and mediaeval stone structures such as Newbridge and Abingdon Bridge are still in use. Kingston's growth is believed to stem from its having the only crossing between London Bridge and Staines until the beginning of the 18th century. Proposals to build bridges across the Thames at Lambeth and Putney in around 1670 were defeated by the Rulers of the Company of Watermen, since it would mean ruin for the 60,000 rivermen who provided a pool of naval reserve. During the 18th century, many stone and brick road bridges were built from new or to replace existing structures, both in London and further up the river. These included Westminster Bridge, Putney Bridge, Datchet Bridge, Windsor Bridge and Sonning Bridge. Several central London road bridges were built in the 19th century, most conspicuously Tower Bridge, the only bascule bridge on the river, designed to allow ocean-going ships to pass beneath it. The most recent road bridges are the bypasses at Isis Bridge and Marlow By-pass Bridge and the motorway bridges, most notably the two on the M25: Queen Elizabeth Bridge and M25 Runnymede Bridge.

The development of the railway resulted in a spate of bridge building in the 19th century including Blackfriars Railway Bridge and Charing Cross (Hungerford) Railway Bridge in central London, and the spectacular railway bridges by Isambard Kingdom Brunel at Maidenhead, Gatehampton and Moulsford.

The world's first underwater tunnel was the Thames Tunnel by Marc Brunel built in 1843 and used to carry the East London Line. The Tower Subway was the first railway under the Thames, which was followed by all the deep-level tube lines. Two road tunnels were built in East London at the end of the 19th century, the Blackwall Tunnel and the Rotherhithe Tunnel, and the latest tunnel is the Dartford Crossing.

Many foot crossings were established across the weirs that were built on the non-tidal river, and some of these remained when the locks were built – for example at Benson Lock. Others were replaced by a footbridge when the weir was removed as at Hart's Weir Footbridge. Around the year 2000, several footbridges were added, either as part of the Thames Path or in commemoration of the Millennium. These include Temple Footbridge, Bloomers Hole Footbridge, the Hungerford Footbridges and the Millennium Bridge, all of which have distinctive designs.

Some ferries still operate on the river. The Woolwich Ferry carries cars and passengers across the river in the Thames Gateway and links the North Circular and South Circular roads. Upstream are smaller pedestrian ferries, for example Hampton Ferry and Shepperton to Weybridge Ferry; the latter is the only non-permanent crossing that remains on the Thames Path.

Note on the listing
The list starts at the downstream (estuary) end and follows the river upstream towards the source. A few of the crossings listed are public pedestrian crossings utilising walkways across lock gates and bridges above or adjacent to the adjoining weirs. Most of the other locks on the River Thames also have walkways across their lock gates and weirs, but these either do not completely cross the river, or are restricted to authorised personnel only, and are therefore not listed. Besides the ferry crossings listed, there are commuter boat services operating along the river in London, and tourist boat services operating both in London and upstream. Whilst the principal purpose of these services is not to carry people across the river, it may be possible to use them to do so.

Proposed
A Lower Thames Crossing is proposed, at or east of the Dartford Crossing. Three options were announced in April 2009.

Proposed or under construction

 * A new rail tunnel is being constructed between Plumstead and North Woolwich as part of the Crossrail scheme.
 * The Silvertown Link is a proposed bridge or tunnel to relieve the Blackwall Tunnels between the Greenwich Peninsula and West Silvertown.
 * The Gallions Reach Ferry is a proposed ferry service to replace the Woolwich Ferry, between Beckton and Thamesmead.

Former

 * At least two Emergency Thames Bridges were erected as a precaution against enemy action during World War II. The first of these bridges was built from Victoria Embankment to County Hall, London and was constructed in 1942 before being demolished in 1948. The second such bridge was constructed at Millbank outside the Tate Britain in 1942 before also being dismantled in 1948.

Planned

 * Garden Bridge, a pedestrian bridge between Waterloo and Blackfriars bridges.

Former

 * The Datchet Bridge, built in 1707, was demolished in 1848.
 * The Walton Bridge, opened in 2013, replaced two earlier bridges, built in 1953 and 1999.

Proposed

 * A pedestrian and cycle bridge is proposed between Reading and Caversham Bridges, to be located east of Fry's Island.

Beyond Cricklade
Not all of the bridges beyond Cricklade are listed below. For example, there are a number of small agricultural bridges allowing access between fields, and bridges to properties in Ashton Keynes that are not mentioned.

The river splits as it passes through Ashton Keynes. An alternative route to that listed above crosses High Bridge at 51.63694°N, -1.92944°W and Three Bridges at 51.63833°N, -1.93917°W.