Robert Leigh may refer to:
- Robert Leigh (physicist), Canadian physicist
- Robert K. Leigh (1852–c. 1924), English-born Hong Kong architect and civil engineer
- Robert Holt Leigh (1762–1843), British member of parliament
- Robert Devore Leigh, American political scientist and founding president of Bennington College
- Robert Leigh (Irish bioinformatician and biostatistician) with TILDA, Trinity College Dublin.