Sir John Fowler, 1st Baronet, English engineer, designed the Forth Bridge (died 1898)

Sir John Fowler, 1st Baronet, KCMG, LLD, FRSE was an English civil engineer specialising in the construction of railways and railway infrastructure. In the 1850s and 1860s, he was engineer for the world's first underground railway, London's Metropolitan Railway, built by the "cut-and-cover" method under city streets. In the 1880s, he was chief engineer for the Forth Bridge, which opened in 1890. Fowler's was a long and eminent career, spanning most of the 19th century's railway expansion, and he was engineer, adviser or consultant to many British and foreign railway companies and governments. He was the youngest president of the Institution of Civil Engineers, between 1865 and 1867, and his major works represent a lasting legacy of Victorian engineering.

The Forth Bridge is a cantilever railway bridge across the Firth of Forth in the east of Scotland, 9 miles west of central Edinburgh. Completed in 1890, it is considered a symbol of Scotland, and is a UNESCO World Heritage Site. It was designed by English engineers Sir John Fowler and Sir Benjamin Baker. It is sometimes referred to as the Forth Rail Bridge, although this is not its official name.