William Comyn

William Comyn may refer to:
 * William Cumin, or Comyn, medieval bishop of Durham elect, and Lord Chancellor of Scotland
 * William Comyn, Lord of Badenoch (1163–1233)
 * William Comyns Beaumont (1873–1956), British journalist, author and lecturer
 * William Leslie Comyn (1877–?), Californian businessman and shipbuilder
 * William Comyn, Lord of Kilbride (died 1283), sheriff of Ayr in 1263