Kim Si-a (; born May 6, 2008) is a South Korean actress. She had notable roles in Miss Baek (2018), Ashfall (2019), Kingdom: Ashin of the North (2021) The Silent Sea (2021) and Sweet Home (2023).
She signed an exclusive contract with Mystic Entertainment in 2019. In 2024, she parted ways with Mystic and signed an exclusive contract with BH Entertainment.
She has a younger sister, Kim Bo-min, who is a child actress.