Eun Soo-mi (Korean: 은수미; Hanja: 殷秀美, born 6 December 1963) is a South Korean activist and politician who served as a member of National Assembly from 2012 to 2016. She was elected as the Mayor of Seongnam in 2018, making her the first woman to hold the position.

Eun was born in Jeongeup, North Jeolla,^[1] but grew in Gwanak District of Seoul. Her father was a soldier.^[2] Later, in 2013, she recalled her childhood: "I used to live at Sillim-dong for around 20 years. At that time my family was likely rich, compared to most of my friends living at slums. I faced 2 impressive incidents, one was when I was a primary student. I pushed my friend as "playing", then her body involuntarily broke the wall and moved to the next door. For me it was quite shocking, because it was totally different from my home. Another incident was happened when I was a secondary student. During that time one of my friends lost her father, so I visited her house. I realised that her family rented a mud house."^[3]

She earned a Bachelor's Degree of Sociology from Seoul National University.^[4] Initially, she desired to be a nun, but gave up as her parents didn't allow.^[5]

During the early of 1990s, Eun was a member of South Korean Socialist Workers' Alliance,^{[6][3][7][8][5][4]} along with Cho Kuk and Rhyu Si-min. This activity caused her to be detained in 1992, under the breach of National Security Act.^[8][5] She later mentioned she was tortured by Agency for National Security Planning and underwent several diseases.^[6][7][8][5] It made her to be selected as a prisoner of conscience by Amnesty International.^[8]

In 2004, she was hired to Korea Labour Institute and used to write various theses.^[7][2] This experience boosted her career, made her as one of the well-known labour experts.^[7]

On 26 April 2018, a person revealed that he was a driver for Eun, and was paid by Komatrade, a company linked to a local gang group, called the International Mafia.^[15][16] This controversy was reviewed by Unanswered Questions of SBS in 21 July. It was reported that her predecessor, Lee Jae-myung, was also implicated into the case.^[17] She was sued by the prosecution in 11 December.^[18]

On 2 September 2019, Eun was fined 900,000 won for violating the Political Funds Act [ko]. Due to being fined less than 1 million won, Eun was able to maintain her mayorship.^[19] On 30 November 2021, Mayor Eun was indicted by prosecutors on charges on graft and corruption. Eun is accused of having rewarded a 450 million won streetlight replacement contract to an unidentified company in exchange for insider information during the probe into her Political Funds Act violation. The police officer who leaked the insider information is accused of having received 75 million from the company that won the contract. In addition, Eun is alleged to have helped the officer's acquittance secure a position in the municipal government. Eun was also indicted on allegations of having received gifts of cash and wine worth around 4.67 million won from an aide between October 2018 to December 2019. Eun has denied all the allegations from the prosecution.^[20]