Leens (Gronings: Lains also called Lydinge, ruling: Leidinge) is the headquarters of the municipality of De Marne in the province of Groningen. The village counted in 2016 according to Statistics Netherlands in 1,791 inhabitants.
For 1990, Leens was an independent municipality that consisted of the villages, hamlets and neighborhoods of the villages, hamlets and neighborhoods: Douwen, Ewer, Grijssloot, Groot Maarslag, Kattenburg, Klein Maarslag, Mensingeweer, Roodehaan, Schouwen, Tort, Warfhuizen, Wehe Hoorn and Zuurdijk. The town hall was in Wehe-den Hoorn. In 1990, the municipality was merged with the municipalities of Ulrum, Eenrum and Kloosterburen to the municipality of Ulrum. In 1992, the name was changed to that of the region, "De Marne".