There has been a church at Ainstable, on its present site overlooking the village, for over 900 years.The manor of Ainstable was held by the Denton family. During the reign of Edward IV the church was appropriated to the Nunnery on Croglin Water which, until its dissolution in 1534, supplied priests for Ainstable. You can see the Nunnery Sanctuary stone between Ruckcroft and Staffield.
In 1871 The Diocese granted a faculty to pull down the church and use the material for rebuilding. The present building in its Gothic style succeeding a similar stone one which had stood for 100 years, was erected in 1872 at a cost of £2000. A fine oak screen was erected in 1888 in memory of Elizabeth Aglionby. However, due to poor foundations the tower had to be dismantled in 1983. The church seats about 100 people. The south transept houses the “Harrison & Harrison” organ, considered to be a fine instrument of approximately 424 pipes.