James Thomas Humberstone (8 July 1850 – 12 June 1939) was an English chemical engineer.
Humberstone arrived at the Peruvian port of Pisagua on 6 January 1875, where he commenced working as a chemist and engineer.
In 1879, as part of the War of the Pacific, the Chilean army landed in Pisagua, and consequently, many office workers went to the Pampa for safety.
When the war ended, and Tarapaca became part of Chile, Humberstone returned to his mining business.
[5] Humberstone died in Iquique on 12 June 1939 and is buried in the British Cemetery, Tiliviche, Chile.