Fosterville is a rural community located in western York County, New Brunswick, Canada, mainly on Route 122 Situated on the Canada–United States border in the parish of North Lake, Fosterville has a small population but is popular in the summer months with cottage owners from the state of Maine and surrounding areas in New Brunswick.
The community was home to a school up until the late 1980s when it was closed by the New Brunswick Department of Education.
In 2004 the building was removed and replaced with a new, modern structure to meet the needs of the parish.
On November 26, 1924 two young girls from the town were murdered in their half-uncle's cabin.
Darius Thornton, who changed his name to Harry D. Williams to evade his ex-wife, shot both of the girls in the head.