Dirk de Vries Lam (20 January 1869, Leeuwarden – 5 July 1937, Groningen) was a Dutch painter who specialized in cityscapes. The name De Vries, from his mother's side of the family, was added, by official permission, in 1897.
He was the son of Herman Lam, a pharmacist, and his wife, Willempje née De Vries-Reilingh. He received his first drawing lessons at the Hogere Burgerschool in Leeuwarden. He then moved to Amsterdam, where he studied at the School of Applied Arts from 1888 to 1891. His instructors there included Jan Derk Huibers and . This was followed by advanced studies at the Rijksakademie, with August Allebé and Pierre Cuypers. Upon graduating, he was awarded certificates in drawing and engineering.
Shortly after, he was appointed an instructor at the (Arts and Crafts School) in Amsterdam. In 1895, he took a position as an art teacher at the Burgerschool in Enkhuizen. He also worked in Monnickendam, Volendam and Hoorn. In 1900, he married Sara Jacoba Maria de Gavere (1872-1953).
He received a major promotion in 1903; becoming Director of the Academie Minerva in Groningen. In that position, he increased the number of classes devoted to the practical and applied arts; adding courses on lithography, batik, and upholstery. He also ensured that his students learned how to paint directly from nature, rather than by copying existing works. In 1905, he added architecture to the curriculum. The Academie was incorporated as a Secondary Technical School in 1913.
He stayed there until 1934. His students included Jan Altink,,, Alida van Houten,, Jan Wiegers and . Many of them would later belong to the artists' collective known as "De Ploeg".
In addition to painting and teaching, he was active as an art critic; contributing articles to the , among several others. He was also a board member of the, an organization devoted to promoting the visual arts.