Richmond Bridge is a Grade I listed 18th-century stone-arched bridge in south west London, which crosses the River Thames at Richmond, connecting the two halves of the present-day London Borough of Richmond upon Thames. Because the river meanders from its general west to east direction, flowing from southeast to northwest in this part of London, what would otherwise be known as the north and south banks are often referred to as the "Middlesex" (Twickenham) and "Surrey" (Richmond) banks respectively, named after the historic counties to which each side once belonged.
The bridge was built between 1774 and 1777 to the designs of James Paine and Kenton Couse, as a replacement for a ferry crossing which connected Richmond town centre on the east bank with its neighbouring district of East Twickenham (St. Margarets) to the west. Its construction was privately funded by a tontine scheme, for which tolls were charged until 1859.
The bridge was widened and slightly flattened in 1937–40, but otherwise still conforms to its original design. The eighth Thames bridge to be built in what is now Greater London, it is today the oldest surviving Thames bridge in London.