It is Located on Rama I Road to the west of Pathum Wan intersection in the heart of Siam area, a shopping area in Pathum Wan district, Bangkok, Thailand.

The upper level allows transfer between trains heading to Khu Khot and the National Stadium.

The lower interchange level allows transfers between trains heading to Bang Wa and Kheha.

The station is located on Rama I Road to the west of Pathum Wan intersection in the heart of Siam area.

Additionally, an elevated walkway (called Sky Walk) connects Siam station to Central World Plaza, the Ratchaprasong junction and Chit Lom station.