Lee Jin-sook (; born July 4, 1961) is a South Korean journalist and politician. She served as a reporter for Munhwa Broadcasting Corporation, head of the news department, and CEO of Daejeon Munhwa Broadcasting Corporation. She was the Chairwoman of the Korea Communications Commission under presidents of Yoon Suk Yeol and Lee Jae Myung until September 30 2025, when the KCC was abolished.
Lee was appointed as the chairwoman of the Korea Communications Commission on July 31, 2024. She was the first Chairwoman to be impeached by the National Assembly on August 2, just two days after her appointment. She was suspended from her duties until the impeachment was dismissed on January 23, 2025 by the Constitutional Court of Korea.
On 2 October 2025, Lee was detained on charges of violating election laws and breaching political neutrality through her appearance on conservative YouTube channels in 2024. On 4 October, her petition for a judicial review was accepted, resulting in her release later that day.