|Full name||Adrianus Cornelis Koster|
|Date of birth||18 November 1954|
|Place of birth||Zierikzee, Netherlands|
|Saudi Arabia U23 (manager)|
|1985–1986||FC Eindhoven (assistant)|
|1986–1990||Willem II (assistant)|
|2014–2015||VfB Stuttgart (assistant)|
|2015–||Saudi Arabia U23|
|* Senior club appearances and goals counted for the domestic league only.
Adrianus Cornelis „Adrie“ Koster (Dutch pronunciation: [ɑdriˈjaːnɵs kɔrˈneːlɪs ˈɑdri ˈkɔstər]; born 18 November 1954 in Zierikzee, Zeeland) is a Dutch football manager who is currently the manager of Saudi Arabia U23. He is a former football winger from the Netherlands and former manager of AFC Ajax, Club Brugge and the Netherlands Under-21 team.
He played for Roda JC (1977–1979) and PSV Eindhoven (1979–1983). He played his last match in the Eredivisie on 2 October 1982, replacing Jurrie Koolhof. In the follow season 1983/1984 retired from his professional football career.
Koster obtained three caps (no goals) for the Netherlands national football team in 1978.
Koster later became a football manager, and started to work as an assistant for FC Eindhoven (1985–1986).
Since then he worked for Willem II Tilburg (1986–1991), Roda JC (1991–1993), Helmond Sport (1993–1995), TOP Oss (1995–1997), Excelsior Rotterdam (1997–2003), VVV-Venlo (2004–2005), and RKC Waalwijk (2005–2006).
On June 2013 Adrie Koster signed a contract with Club Africain. Although the club was first in the league, Koster was sacked in January 2014.
On March 2014 Adrie Koster was named head coach of the Netherlands Under-21 team, after managing successfully the Netherlands U20 Hopefuls in 2012.
- "Marwijk is the new headcoach of Saudi Arabia". Saudi Arabian Football Federation. 25 August 2015. Retrieved 28 December 2015.
- Adrie Koster: "Brugge uitdaging". Telegraaf.nl (2009-04-08). Retrieved on 2011-10-30.
- Adrie Koster bis Saisonende Trainer bei Ajax. Sport.orf.at. Retrieved on 2011-10-30.
- Adrie Koster wordt volgend seizoen hoofdtrainer van Club Brugge. Clubbrugge.be (2009-04-07). Retrieved on 2011-10-30.
- Koster to join Club Brugge Archived 14 April 2009 at the Wayback Machine.. English.ajax.nl (2006-07-06). Retrieved on 2011-10-30.
- Club Brugge coach signs contract extension. Ontheminute.com. Retrieved on 2011-10-30.
- sporza: Beerschot neemt afscheid van coach Adrie Koster. Sporza.be. Retrieved on 2012-11-29.
- "It's tingling again". vfb.de. VfB Stuttgart. 25 November 2014. Retrieved 25 November 2014.
- (Dutch) Profile