The 1985 Dutch Open was a Grand Prix men's tennis tournament staged in Hilversum, Netherlands. The tournament was played on outdoor clay courts and was held from 22 July until 28 July 1985. It was the 28th edition of the tournament. Ricki Osterthun won the singles title.
See main article: 1985 Dutch Open – Singles. Ricki Osterthun defeated 
Kent Carlsson 4–6, 4–6, 6–4, 6–2, 6–3
See main article: 1985 Dutch Open – Doubles. Hans Simonsson / Stefan Simonsson defeated 
Carl Limberger / Mark Woodforde 6–3, 6–4