Kwak Sang-eon (Korean: 곽상언, born 18 November 1971) is a South Korean politician and lawyer serving as a member of the National Assembly. He is known as the son-in-law of former President Roh Moo-hyun.

Kwak worked as a lawyer after passing the bar exam in 2001. He was very interested in public interest litigation activities, such as his lawsuit against Korea Electric Power Corporation from 2012 to 2023.

He announced his entry into politics in August 2019 and was defeated in the 2020 general election, but gained political experience while serving as vice president of the Democratic Party of Korea's Democratic Research Institute. In April 2024, he was elected to the National Assembly, defeating the People Power Party's candidate Choi Jae-hyung in the Jongno, often described as "No. 1 district of politics."

Kwak was born in Seoul on 18 November 1971. He passed the bar exam in 2001, completed a three-year course at the Judicial Research and Training Institute, and worked as an attorney at the Yoon & Yang law firm since January 2004.^[1] He married Roh Jeong-yeon, the daughter of President-elect Roh Moo-hyun, in February 2003, and had a daughter in August 2004.^[2][3]

After training in the United States around 2005, Kwak returned to Korea and opened a private law office.^[4] In 2009, he was investigated by the prosecution along with the Roh Moo-hyun family.^[5] After former president Roh died in May of that year, he did not appear in the media for a while.

Kwak joined the Democratic Party of Korea in January 2020. He competed with Seong Nak-hyeon, former president of the Korea Self-Reliance Center Association, to run for the Boeun·Okcheon·Yeongdong·Goesan constituency in North Chungcheong Province. After winning the primary, Kwak ran against candidate Park Deok-heum of the United Future Party, but lost with 41.44% of the votes.^[7]

He ran for the Jongno constituency in the 2024 election, and was elected to the National Assembly after defeating People Power Party candidate Choi Jae-hyung in his second attempt.^[8][9]