Johann Hornung (c. 1660 Tallinn – 1715) was a Baltic-German Lutheran clergyman and language enthusiast.^[1]

He worked as a sacristan in several Estonian churches, including Põltsamaa (1692-1698) and Karula (1698-1715).^[1]

With Adrian Virginius, he translated New Testament into North Estonian. 1694 he published religious book "Önsa Luterusse Laste Öppetuse ...", and he was a co-author of the religious book "Ma Kele Koddo ning Kirgo Ramatu".^[1]

His most important work was Latin-language Grammatica Esthonica ... which gave the overview of grammar of the North Estonian language.^[1]