Barntrup (German pronunciation: [ˈbaʁntʁʊp] ⓘ) is a town in the Lippe district of North Rhine-Westphalia, Germany.

Barntrup and Alverdissen were founded by the Earl of Sternberg in the year 1220.

Originally Barntrup was called Barendorf and was a village at the Schratweg.

Between 1317 and 1359 Barntrup was built on the highest point of the "Thornesberg" which is 189 m high above sea level.

Her husband, Franz von Kerssenbrock, had been a mercenary in the French Wars of Religion, where he had made much money.