Wesley Fletcher Orr (March 3, 1831 – February 16, 1898) was a Canadian businessman, journalist, and politician.

He also contributed to newspapers such as the Northern Gazette (Barrie, Ontario) and the Hamilton Spectator.

In 1883, Orr was advised by D'Alton McCarthy to buy land at Fort Calgary prior to the arrival of the Canadian Pacific Railway.

He was also involved in real estate, buffalo bone trading, operated a stone quarry, and was a financial agent.

He chaired the committee of public works which was responsible for the creation of much of the early infrastructure in Calgary, including: electric light, the General Hospital, sewage, municipal financing and water.