Alexander Keith Johnston (1844–1879)

Alexander Keith Johnston (1844, November 11 in Edinburgh – 1879, June 28 in Tanzania) was a Scottish explorer and geographer.

He was the son of Alexander Keith Johnston (1804-1871).

From 1873 to 1875 he was geographer to a commission for the survey of Paraguay; and he died in Africa while leading the Royal Geographical Society's expedition to Lake Nyasa.