John K. Ewers (13 June 1904 – 1978) was a novelist, poet, schoolteacher and short story writer from Western Australia. He was the second son Ernest Ewers, orchardist, and his wife Annie Eliza, née Gray. When he was 6 his mother died. He was educated at James Street Intermediate and Perth Modern schools, and Claremont Teachers' College. The Australian Journal published (1924) his first short story, under the nom-de-plume, 'J. K. Waterjugs'. He wrote early on in his career in Our Rural Magazine, and Walkabout magazine
He was involved in the Western Australian branch of the Fellowship of Australian writers and was its President
He also co-authored, with Deirdre Ellis Weston, grammar textbooks "English for High Schools" Perth, W.A.: Carrolls, "Passport to Understanding" Melbourne : Thomas Nelson (Australia), 1971, and "Passport to Adventure" Melbourne : Thomas Nelson (Australia), 1973 which were used widely throughout Western Australian schools during the 1950s to 1970s.