Daniel Yoo (born 25 September 1985) is a South Korean tennis player.
Yoo has a career high ATP singles ranking of 326 achieved on 13 June 2011.
He also has a career high ATP doubles ranking of 425 achieved on 15 August 2011.
Yoo made his ATP main draw debut at the 2004 Legg Mason Tennis Classic after receiving a wildcard into the main draw.