Richard Peacock (9 April 1820 – 3 March 1889) was an English engineer, one of the founders of locomotive manufacturer Beyer-Peacock.
Born in Swaledale, Richard Peacock was educated at Leeds Grammar School but at 14 left to be apprenticed at Fenton, Murray and Jackson in Leeds.
At 18 Peacock was a precocious locomotive superintendent on the Leeds and Selby Railway. When the line was acquired by the York and North Midland Railway in 1840 he worked under Daniel Gooch at Swindon, but reputedly fled to escape Gooch's wrath. In 1841, he became the Locomotive Superintendent of the Sheffield, Ashton-under-Lyne and Manchester Railway, subsequently the Manchester, Sheffield and Lincolnshire Railway from 1847. In this role he was responsible for founding the Gorton locomotive works for this railway, although he had left the firm shortly before they were completed in 1848.
In 1847 Peacock was present with Charles Beyer at a meeting at Lickey Incline which it is generally acknowledged gave birth to the Institution of Mechanical Engineers. George Stephenson was elected as first president and Charles Beyer as a vice president. Peacock became a member of the Institution of Civil Engineers in 1849.