Rama IX Bridge is a bridge in Bangkok, Thailand over the Chao Phraya river. It connects the Yan Nawa district to Amphoe Phra Pradaeng, in the Samut Prakan Province as a part of the Dao Khanong – Port Section of Chalerm Maha Nakhon Expressway.
The bridge was named in honour of King Bhumibol Adulyadej's 60th birthday; the 5 December opening date coincides with the King's birthday. It was the first cable-stayed bridge in Thailand and had the second longest cable-stayed span in the world when it opened in 1987.
The original colour scheme, with white pylons and black cables, was replaced with an all yellow scheme representing the King in 2006.