Clanwilliam

Clanwilliam may refer to:
 * Clanwilliam (County Tipperary), barony in Ireland
 * Earl of Clanwilliam, title in the Peerage of Ireland
 * Theodosia Meade, Countess of Clanwilliam
 * Clanwilliam Rugby Club, in Tipperary
 * Clanwilliam (County Limerick), barony in Ireland
 * Clanwilliam, Western Cape, town in South Africa
 * Clanwilliam, Manitoba, rural municipality in Canada