John Henry Cann (19 April 1860 – 21 July 1940) was a New South Wales politician, Treasurer, and Minister of the Crown in the cabinets of James McGowen and William Holman.

[2] When the AMA formed a local branch of the Labor Electoral League in 1891 Cann was preselected as candidate for the state parliament seat of Sturt and elected in the same year.

[1] Cann was elected unopposed as the sitting member, Wyman Brown, decided to retire after local unions passed a motion of no confidence in him.

Cann was able to persuade the Premier, Henry Parkes, to commission emergency supplies of water brought in from South Australia by train.

This opposition to federation was controversial locally, and although the "No" vote was successful, it caused significant internal conflict within the Labor party in the far west.

Parliament was porouged and on its resumption, Liberal Reform member Henry Willis was elected speaker and restoring Labor's majority.