|Full name||Adrianus Cornelis Koster|
|Date of birth||18 November 1954|
|Place of birth||Zierikzee, Netherlands|
|Playing position||Winger (retired)|
|VfB Stuttgart (assistant)|
|1985–1986||FC Eindhoven (assistant)|
|1986–1990||Willem II (assistant)|
|2014–||VfB Stuttgart (assistant)|
* Senior club appearances and goals counted for the domestic league only.
Adrianus Cornelis „Adrie“ Koster (Dutch pronunciation: [ˌɑdrij.ˈaːn.ʏs kɔr.ˈne.ˌlɪs ˈɑd.ri ˈkɔs.tər]) (born 18 November 1954 in Zierikzee, Zeeland) is a former football winger from the Netherlands, who is currently in charge of VfB Stuttgart as assistant coach of Huub Stevens.
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). At the last club he was fired due to poor performances on 27 November 2006.
On 25 February 2010 Koster's contract with Club Brugge was extended until the summer of 2011. After a four game losing streak in all competitions, he was fired on October 30, 2011. He joined Beerschot following the 2011-12 season, but was sacked in November of the same year.
- Adrie Koster: "Brugge uitdaging". Telegraaf.nl (2009-04-08). Retrieved on 2011-10-30.
- Adrie Koster trainer Club Brugge. Rijnmond.nl (2009-04-07). 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. 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: Club Brugge ontslaat coach Adrie Koster. Sporza.be. 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.
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