Koos Maasdijk

{{Short description|Dutch rower (born 1968)}}

{{Use dmy dates|date=April 2018}}

{{BLP sources|date=November 2010}}

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{{MedalSport | Men's rowing}}

{{MedalCountry | the {{NED}} }}

{{MedalCompetition|Olympic Games}}

{{MedalGold| 1996 Atlanta | Eight}}

{{MedalBottom}}

Jacob "Koos" Arnold Maasdijk (born 19 September 1968 in Rotterdam, South Holland) is a former rower from the Netherlands, who won the gold medal with the men's eights at the 1996 Summer Olympics in Atlanta, Georgia. He had also competed at the 1992 Summer Olympics, finishing fifth in the men's fours.{{cite Sports-Reference |url=https://www.sports-reference.com/olympics/athletes/ma/koos-maasdijk-1.html |title=Koos Maasdijk |archive-url=https://web.archive.org/web/20200418100000/https://www.sports-reference.com/olympics/athletes/ma/koos-maasdijk-1.html |archive-date=2020-04-18}}