Napier Bridge, Road bridge in Chennai, India.

Napier Bridge spans the Cooum River with multiple arches that carry vehicle traffic between Marina Beach and the Fort St. George area. The structure links Chennai's center to its coastal zone and serves as a vital transportation route through the city.

Francis Napier, Governor of Madras from 1866 to 1872, planned a bridge across the mouth of the Cooum in 1868; a cast iron lattice bridge opened in 1869. Corrosion forced its replacement in 1909 by a girder bridge, which was itself rebuilt in pre-stressed concrete, the first such bridge in India, and opened to traffic in 1944. A parallel concrete bridge was added on the western side in 1999.

Locals call it the Iron Bridge, a name kept from the 1869 cast iron structure. Since 2022 the deck has been painted in a black-and-white chessboard pattern for the 44th Chess Olympiad held in Chennai, an artwork that drew mixed reactions, some finding it disorienting.

The bridge carries six spans with bowstring arches over the mouth of the Cooum, with a 10.5 m western carriageway, a 9.75 m eastern one and 2 m footpaths on each side. Pedestrians share the deck with traffic, so cross on foot and keep to the footpath. The white paint of the arches was maintained until the early 2020s, before the 2022 chessboard repainting.

In 2022, ahead of the 44th Chess Olympiad in Chennai, the bridge was painted in a black-and-white chessboard pattern. Reactions were mixed: some praised the artwork, while others found the pattern disorienting. The white paint of the arches had been maintained until the early 2020s.