Daniel Yoo (born 25 September 1985) is a South Korean / American former 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.

This biographical article relating to South Korean tennis is a stub.