Seongnam
- Country: South Korea
- City: Seongnam
- Population: 1,002,257
- Area: 34 km2
Mayor: Shin Sang-jin
born: June 28, 1956 (age 67 years), Seoul, South Korea
Party: People Power Party
Office: Mayor of Seongnam since 2022
Graduation dates: 1970, 1973, 1976, 1991
Seongnam is the fourth largest city in South Korea‘s Gyeonggi Province after Suwon and the 10th largest city in the country. Its population is approximately one million. Seongnam is a satellite city of Seoul. It is largely a residential city located immediately southeast of Seoul and belongs to the Seoul Capital Area.