Inchon Kim Seong-su (1891–1955) was a South Korean educator, journalist and politician.

Gim Seong-su or Kim Song-su (Korean: 김성수) may also refer to:

• Kim Sung-su (director) (born 1961), South Korean film director
• Kim Sung-soo (actor) (born 1973), South Korean actor
• Kim Sung-soo (footballer) (born 1963), South Korean footballer
• Kim Seong-soo (footballer) (born 1992), South Korean footballer

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