Robert Stevenson, FRSE, FGS, FRAS, FSA Scot, MWS (8 June 1772 – 12 July 1850) was a Scottish civil engineer, and designer and builder of lighthouses. His works include the Bell Rock Lighthouse.

Robert Stevenson was born in Glasgow. His father was Alan Stevenson, a partner in a West Indies sugar trading house in the city. Alan died of an epidemic fever on the island of St. Christopher in the West Indies on 26 May 1774, a few days before Robert's second birthday. Robert's uncle died of the same disease around the same time. Since this left Alan's widow, Jean Lillie Stevenson, in much-reduced financial circumstances, Robert was educated, as a young child, at a charity school.

Robert's mother intended him to join the ministry, so when he was a bit older she enrolled him in the school of a locally famous Glasgow linguist, a Mr Macintyre. But when Robert was 15, she remarried and the family moved to 1 Blair Street, off the Royal Mile in Edinburgh. Robert's new stepfather was Thomas Smith, a tinsmith, lamp maker, ingenious mechanic, and civil engineer, who had been appointed to the newly formed Northern Lighthouse Board in 1786.

In 1798 or 1799, when Robert was about 26, the family moved to a newly built home, 2 Baxters Place, at the head of Leith Walk.

In 1815, Robert's stepfather died, and Robert inherited the house, where he continued to live until about 1820.

Stevenson served as an apprentice civil engineer to his stepfather, Thomas Smith. He was so successful at it that, at age 19, he was given responsibility for supervising the erection of a lighthouse on Little Cumbrae island in the River Clyde. His next project was overseeing the building of lighthouses on Orkney. While working on these projects, he continued his civil engineering studies: He diligently practised surveying and architectural drawing, and attended maths and physics lectures at the Andersonian Institute in Glasgow.

In the winter, when it was too chilly for construction work, he attended lectures at the University of Edinburgh in philosophy, mathematics, chemistry, natural history, moral philosophy, logic, and agriculture. He was not granted a degree because he did not have the proficiency in Latin or Greek that was a requirement for a degree in those days.

In 1797, he was appointed engineer to the Lighthouse Board, succeeding to his stepfather's place there. In 1799, he married Smith's eldest daughter Jean, who was also his stepsister, and, in 1800, Smith made him his business partner.