John Mather
John Mather may refer to:
- John Mather (artist), Australian landscape painter
- John Mather (academic), English academic administrator at the University of Oxford
- John Mather (businessman), Canadian pioneer in milling
- John Mather (cricketer), Australian cricketer
- John B. Mather, Canadian businessman and politician
- John C. Mather, American Nobel Prize–winning astrophysicist and cosmologist
- John C. Mather (New York politician), American politician
- John N. Mather, American mathematician
- John Perkins Cushing Mather, American politician
- John T. Mather, American industrialist and philanthropist
- John Baxter Mather, Scottish-born journalist, newspaper proprietor, painter and art critic in South Australia