John Hall (5 September 1765 – 7 January 1836) was an English millwright and mechanical engineer, who, in 1785, founded the Dartford-based engineering company which became J & E Hall, today a prominent supplier of refrigeration machinery, and part of the Daikin group. During Hall's lifetime, he helped mechanise the papermaking industry, co-founded the first UK canning firm, and developed steam engines for land and marine use.