Pine Orchard is a hamlet in York Region, Ontario, Canada, in the town of Whitchurch–Stouffville. It is centred at the intersection of Warden Avenue and Vivian Road in the north-western region of Whitchurch–Stouffville. The original settlers were Quakers who, like the early Mennonites of Whitchurch and Markham townships, were pacifists that came north after the American Revolution. The founder of the hamlet was Isaac Phillips, who arrived from Muncy County, Pennsylvania in 1802. A first post-office was established in 1853, and by 1860 three sawmills were operating in the area. In 1858 the hamlet had a population of 35. The community flourished towards the end of the nineteenth century until township; however at the beginning of the twentieth century the township was almost completely deforested, and the forest industry collapsed.