Valentin Bousch (circa 1490 – August 1541) was a Renaissance stained glass glazier and painter from Strasbourg, active in the Duchy of Lorraine and the Republic of Metz. A rarity among stained glass artists, Bousch is seen as one who actively sought to express new ideas in his art, often before they were widely used in the area, revising his method even from one window to the next, to create striking Renaissance effects and a personal style.
Bousch was born in Strasbourg. The earliest mention of his work is at Saint-Nicolas-de-Port, near Nancy in 1514. Bousch was active there from 1514 to 1520, developed a large glass studio and made many windows for the Saint Nicolas basilica. In 1518 he also made windows for the priory church of Varangéville on a command of the Bishop of Metz, John IV of Lorraine. On 25 September 1518, Valentin Bousch became the master glazier of the cathedral of Metz, where most work was done in the years 1520-1528, and 1534-1539. In between, he made a cycle of biblical scenes for the Saint-Firmin priory church in Flavigny-sur-Moselle. A number of documents relating to Bousch, including his will are at the Bibliothèque municipale de Nancy.