Heiligerlee (Dutch: [ˌɦɛiləɣərˈleː]; Gronings: Kloosterholt [ˈkloʊstərɦɔːɫt]) is a village in the Dutch province of Groningen bordering the town of Winschoten, it is part of the municipality of Oldambt.

It was the site of the 1536 Battle and the 1568 Battle of Heiligerlee From the year 1230 till the year 1594 a Norbertine nunnery (Mons Sinaï) stood in the village, the name of which is currently used as the name of the village Christian primary school.

The Danish allies of Guelders were defeated by Habsburg forces.

The army led by Louis and Adolf of Nassau defeated the Spanish, but politically it was no success.

It was the first battle of importance fought in the Eighty Years' War, and therefore often marked as its beginning.