Gordon K. Lewis (1919 – August 16, 1991) was a Welsh radical historian of the Caribbean.
Born in Newport, South Wales, Lewis attended University College Cardiff, where he earned a bachelor's degree in Modern English and European History in 1940.
After the war he then pursued postgraduate study at Balliol College, Oxford, and a doctorate at Harvard University.
He was awarded an honorary doctorate from the University of the West Indies, Trinidad and Tobago, in 1984.
Since 2014, the Institute of Caribbean Studies at the University of Puerto Rico has held a Gordon K. & Sybil Lewis Memorial Lecture, with distinguished Caribbean scholars including Verene Shepherd, Anthony P. Maingot, Richard Price, Miguel Ceara Hatton and Hilary Beckles.