Longpont Abbey (Abbaye Notre-Dame de Longpont) was a Cistercian monastery, in present-day Longpont, Aisne, France.
It existed from 1131 to 1793, being founded by monks from the abbey of Clairvaux[1], at the behest of Jocelin of Soissons. There is now a hotel on the site. The original buildings suffered war damage in 1918[2].
Its monks included Petrus Cantor and John de Montmirail[3].