约翰·诺克斯（John Knox，1514年－1572年11月24日），苏格兰牧师，苏格兰宗教改革领导人。

当欧洲宗教改革运动沸沸腾腾之时，苏格兰在玛丽一世管理下，正处在贫穷、封候间内战不断，教会人员亦腐败的状态。十五世纪左右，开始有一些大学成立，包括圣安德鲁斯、格拉斯哥及亚伯丁等。但在学术上当然无法和欧陆的大学相比。因此有许多年青人到威登堡访问路德大学，回国后也撒下改教的种子。而路德的著作，以及丁道尔与利威对勒（Coverdale）的英译圣经开始流传，因此有些苏格兰复原派信徒开始在家中的崇拜与教导。约翰·诺克斯就是在这时扮演苏格兰最伟大的改教者。

John Knox (c. 1513 – 24 November 1572) was a Scottish clergyman, theologian, and writer who was a leader of the Protestant Reformation and is considered the founder of the Presbyterian denomination in Scotland. He is believed to have been educated at the University of St Andrews and worked as a notary-priest. Influenced by early church reformers such as George Wishart, he joined the movement to reform the Scottish church. He was caught up in the ecclesiastical and political events that involved the murder of Cardinal Beaton in 1546 and the intervention of the regent of Scotland Mary of Guise. He was taken prisoner by French forces the following year and exiled to England on his release in 1549.