John Lineham (21 March 1857 – 21 April 1913) was a territorial-level politician and businessman from Northwest Territories, Canada.

He married Mary Elizabeth Martin in Collingwood, Ontario on 21 March 1894 and had two daughters.

[1] Lineham would head to Brandon, Manitoba and enter the cattle business, and later in 1883 he went to Calgary ahead of the Canadian Pacific Railway.

Lineham and Cayley were re-elected by acclamation in the 1891 Northwest Territories general election.

[1][5] Lineham formed the Rocky Mountain Development Company with George Leeson and engineer Allan Patrick,[6] and on 21 September 1902 would make Alberta's first major oil strike in what is now Waterton Lakes National Park.