Daley Sinkgraven (born 4 July 1995) is a Dutch footballer who plays as a left-back for Bayer Leverkusen in the Bundesliga.
Sinkgraven started playing football with MVV Alcides from his hometown Meppel. He ended up in the youth academy of SC Heerenveen. Sinkgraven had a breakthrough season in 2013–14 playing 17 games while starting five of them. He made his debut in the 2–2 draw against Roda JC Kerkrade on 18 January 2014 by replacing Hakim Ziyech. On 28 March 2014, he extended his contract until the summer of 2017. On 22 November 2014, he scored an own goal in a 4–1 away loss to Ajax.
On 30 January 2015, it was announced that Sinkgraven had joined Ajax for a fee of €7 million, making him the club's most expensive acquisition since Miralem Sulejmani, who had also made the transfer to Ajax from Heerenveen. He signed a five and a half year-contract with the club and was given the number 8 shirt previously worn by Lerin Duarte, who was sent on a six-month loan spell to Heerenveen in return. He made his debut for the first team of Ajax in the starting lineup on 5 February 2015 in a 1–0 home loss to AZ.