Lambert Chaumont was a Flemish Baroque composer and organist.
Chaumont was from the Liège area, possibly born in that city. The earliest mention of his name dates from January 1649, when he is listed as a lay brother at the Carmelite monastery at Liège. He was still there in October 1651, and then a monastery accounts entry dated 8 May 1659 lists Chaumont among the nine brothers who completed their novitiates at the monastery at Reims. Nothing is known about the next 15 years of Chamount's life. On 10 February 1674 he was made rector of the parish of St. Martin's Church at Huy. The post was insignificant, and the church and the parish were very small, but eventually Chaumont's career progressed further. On 7 September 1688 he became priest of the parish of the nearby St. Germain's Church, and pater of the Carmelites at Huy. He occupied these positions until his death in 1712.