Triangle is a village in the Calderdale borough of West Yorkshire, England.
It is located in the valley of the River Ryburn, on the A58 road over the South Pennines, between Sowerby Bridge and Ripponden.
Historically a part of the West Riding of Yorkshire, it dates mainly from the 19th century period of industrialisation but was here for some time prior.
During the Second World War it served as officers' quarters for the Royal Engineers, after which it lay empty for 12 years.
In 1957 Thorpe House was repaired and converted into a home for elderly people, which it remained until 1994.