Jang Jin-sung (Korean: 장진성) is the pseudonym of a North Korean poet and government official who defected to South Korea. He worked as a psychological warfare officer within the United Front Department of the Korean Workers' Party. Jang specifically worked within the United Front Department Section 5 (Literature), Division 19 (Poetry) of Office 101. Office 101 created propaganda intended to encourage South Korean sympathy for North Korea.

One of Jang's job duties was to create poetry under a South Korean pseudonym, Kim Kyong-min, and in a South Korean style. His poetry was intended for distribution within South Korea.