Saphan Mon (Thai: สะพานมอญ, pronounced [sā.pʰāːn mɔ̄ːn]; lit. "Mon Bridge") is a historic bridge in Bangkok's Phra Nakhon District. It carries Charoen Krung Road across the old city moat, and was originally built in the reign of King Nangklao (Rama III, 1824–1851), presumably by members of the Mon community who lived nearby. In those days, Mon traders used to settle their boathouses in the area of the bridge. During the reign of King Vajiravudh (Rama VI, 1910–1925), the original wooden structure was replaced with a reinforced concrete bridge with iron railings demonstrating Art Nouveau influence. The bridge is registered as an ancient monument by the Fine Arts Department.

The east end of the bridge is four-way intersection where Charoen Krung cuts across Atsadang Roads, also the first intersection of Charoen Krung Road, and well-known as the location of a renowned old driving and auto mechanic school that was established in 1947.