Kim Sei-young (born 21 January 1993), also known as Sei Young Kim, is a South Korean professional golfer.
Kim plays on the LPGA of Korea Tour and the LPGA Tour. She has won five times on the LPGA of Korea Tour and nine times on the LPGA Tour. Her win at the 2018 Thornberry Creek LPGA Classic set the record for the lowest 72-hole score (257) and the lowest to-par score (−31).