Sir John Craig Eaton was a Canadian businessman and a member of the prominent Eaton family.

The Eaton family is a Canadian family of Scottish-Irish Methodist origin. Established in Toronto, the family dynasty began in 1869 when Timothy Eaton (1834–1907) founded Eaton's, which became a national chain of department stores. At its height, the family's net worth was around $2 billion. Although the Eaton's department store chain went bankrupt in 1999, the family still holds considerable wealth.