Marronnier Park () is a park in the Daehangno district of Seoul.
The park was designated on April 29, 1982 and is large.
At the center of the park is a horse chestnut (marronnier) tree, of the genus Aesculus, for which the park takes its name. The Marronnier originates from the Mediterranean Sea region. From May to June, red or white flowers bloom.
In the park is the , then Keijà  Imperial University.
Though the park is not very large it forms the center of one of Seoul's major theater districts, Daehangno, and is a popular gathering spot for the city's university students.
Hyehwa-dong, Jongno District, near number 2 Exit Hyehwa Station of line .