约翰·凡布鲁爵士（Sir John Vanbrugh，1664年1月24日－1726年3月26日）是英国建筑师与剧作家，最有名的成就是身为布伦亨宫的设计师。

Sir John Vanbrugh (/ˈvænbrə/; 24 January 1664 (baptised) – 26 March 1726) was an English architect and dramatist, perhaps best known as the designer of Blenheim Palace and Castle Howard. He wrote two argumentative and outspoken Restoration comedies, The Relapse (1696) and The Provoked Wife (1697), which have become enduring stage favourites but originally occasioned much controversy. He was knighted in 1714.