Erwin Koeman (born 20 September 1961) is a Dutch former professional football player who currently serves as an assistant coach for the Netherlands national team.

He also served as an assistant manager to his younger brother Ronald Koeman at Premier League clubs Southampton and Everton, and the Netherlands national team.

[5] In April 1983, he and his brother Ronald debuted for the Netherlands national football team during a 3–0 friendly loss against Sweden in Utrecht.

However, on 3 May 2007, Koeman announced his immediate resignation due to motivational problems, after a troublesome season, where Feyenoord eventually finished seventh.

[12] The team failed to qualify for the 2010 FIFA World Cup, and Koeman did not win any of his last four games, the final one being a 6–1 loss to his native Netherlands in June 2010; on 23 July he was dismissed and under-20 manager Sándor Egervári promoted to his place.

[15] On 17 March 2012, Koeman was hired at FC Eindhoven, third-placed in the Eerste Divisie, after Ernest Faber crossed the city to PSV.

[22] Cocu was dismissed at the end of October with the team in 15th in the Süper Lig, and Koeman became caretaker manager,[23] debuting on 2 November with a 2–2 draw at Galatasaray in the Intercontinental Derby.

[31] In May 2022, Koeman was announced as an assistant coach to his brother Ronald at the Netherlands national team, and would commence in the role on 1 January 2023 after the 2022 FIFA World Cup in Qatar.