Roh Moo-hyun (Hangul: 노무현; Hanja: 盧武鉉; Korean pronunciation: [no mu hjʌn]) GOM (1 September 1946 – 23 May 2009) was the 16th President of South Korea (2003–2008).

Roh's pre-presidential political career was focused on human rights advocacy for student activists in South Korea. His electoral career later expanded to a focus on overcoming regionalism in South Korean politics, culminating in his election to the presidency. He achieved a large following among younger internet users, particularly at the website OhMyNews, which aided his success in the presidential election.

Roh's election was notable for the arrival in power of a new generation of Korean politicians, the so-called 386 Generation, (i.e. people in their thirties when the term was coined, who had attended university in the 1980s, and who were born in the 1960s). This generation had been veterans of student protests against authoritarian rule, and advocated a conciliatory approach towards North Korea, even at the expense of good relations with the USA.