Jacobus Eye (Koos) Andriessen (born 25 July 1928, Rotterdam) is a former Dutch politician.
Koos Andriessen joined the Social Economic Council in 1959, giving up that position when he was appointed Dutch Minister of Economic Affairs in 1963. He held this position until 1965, when he became a board of the Van Leer Group of Companies. He rose to become chair, before leaving in 1987 to become chair of the Dutch Christian Employers Association. Then in 1989 he returned to the role of Dutch Minister of Economic Affairs, a position he held until 1994. Koos has played an important role on the Supervisory Boards of such companies as Ballast Nedam, Elsevier, Randstad, ING Group, Hunter Douglas and Novograaf.