William Tierney Clark, English engineer, designed the Hammersmith Bridge (died 1852)

William Tierney Clark FRS FRAS was an English civil engineer particularly associated with the design and construction of bridges. He was among the earliest designers of suspension bridges.

Hammersmith Bridge is a suspension bridge that crosses the River Thames in west London. It links the southern part of Hammersmith in the London Borough of Hammersmith and Fulham, on the north side of the river, with Barnes in the London Borough of Richmond upon Thames, on the south side of the river. The current bridge, which is Grade II* listed and was designed by civil engineer Sir Joseph Bazalgette, is the second permanent bridge on the site, and has been attacked three times by the IRA.