Luke John Herrmann (born Lutz Johann Wolfgang Maximilian Hermann; 9 March 1932 – 9 September 2016) was a British art historian who was an expert on the art of J. M. W. Turner.
Herrmann was born on 9 March 1932 in Berlin into a German Jewish family. He was educated in England at Westminster School and at the University of Oxford.
Herrmann briefly worked at the Illustrated London News. While there, he got to know editor Bruce Ingram, who was a prominent art collector and under whose guidance he began to collect English watercolour paintings in the 1950s. After Ingram's death in 1963, Herrmann inherited over 30 pictures from him, which he donated to a selection of British art galleries in 2002. He later worked at the Ashmolean Museum.
In 1965, Herrmann married Georgina ( Thompson); she would go on to become a notable archaeologist of Western Asia. Together they had two sons.
Herrmann died on 9 September 2016.