Lucy Haeran Koh (born August 7, 1968) is a United States District Judge of the United States District Court for the Northern District of California and is a former nominee to be a United States Circuit Judge of the United States Court of Appeals for the Ninth Circuit.
She is the first Asian American United States district court judge in the Northern District of California, the first district court judge of Korean descent in the United States, the first female Korean American Article III judge, and the second Korean American federal judge, after Herbert Choy of the Ninth Circuit.