Heversham Grammar School was founded and endowed on 24 January 1619/20,[1] by Edward Wilson, Kt (1557-1653), of Nether Levens, who also owned Heversham Hall.

[2] It occupied the site known in recent years as Old School, above and behind the village church, on Heversham Head.

[3] Milnthorpe Secondary School was founded in 1951 and, after occupying many different buildings around the village, moved to Dallam's current location in 1968, complete with Community Centre.

In 2010, the school brought the PE department down from the Heversham site with an all-weather astroturf pitch, and new sports facilities.

In 2019, Ms Julie O'Connor became Executive Headteacher of the school.