John Emerson (June 4, 1859[1] – July 25, 1932) was the 15th mayor of Calgary, Alberta.

Born in England, Emerson emigrated to Calgary in 1885 and began farming on a homestead just outside the city limits.

Soon he left farming and established a successful grocery business on Stephen Avenue.

During his tenure as mayor, Calgary hosted a number of prominent visitors.

Emerson would be joined by Major James Walker, William Henry Cushing, and W. M.