Dominican College Portstewart (Irish: An Coláiste Doiminiceach, Port Stíobhaird, locally known as DCP) is a grammar school in Portstewart, County Londonderry, Northern Ireland.
 
It is situated on a cliff overlooking the Atlantic Ocean with views over Portstewart's promenade, the northern coastline of Northern Ireland and the County Donegal hills in the Republic of Ireland.