Ryan Henk Donk (born 30 March 1986) is a Dutch professional footballer who plays as a midfielder for Turkish club Galatasaray. He can also play as a centre back.
Ryan Donk impressed in the 2005–06 season at RKC Waalwijk, and with an expiring contract, he wanted to make a step up to a higher level. AZ first approached him, but other clubs including Ajax, PSV and Barcelona showed serious interest in him. Donk chose to go to AZ as a replacement for defender Joris Mathijsen who had been sold to German club Hamburger SV, thinking it to be the best for his development. Initially AZ intended to loan Donk to RKC Waalwijk, but the player stated his intent to stay at the club in an attempt to push into the first team. He earned himself a place in the starting line-up and impressed with his performances at AZ.
On 31 August 2008, Donk signed for West Bromwich Albion for one year on loan. He made his debut in a 1–0 win away at Middlesbrough on 28 September 2008.