Seo Hyuk-Su (born October 1, 1973, in Jecheon, South Korea) is a Korean-Australian former footballer.

Hyuk-Su Seo played every second of the inaugural A-League season and has currently played the equal second-greatest number of games for the Queensland Roar along with Massimo Murdocca, as of January 2009, behind Matt McKay.

He became an Australian citizen in 2007.

[citation needed] The 35-year-old Queensland Roar foundation player was released from his contract, after 4 years with the Roar.

Seo was a highly valued member of the team and a fan favourite during his time with the club.