Krung Thon Bridge (Thai: สะพานกรุงธน, RTGS: Saphan Krung Thon, pronounced [sā.pʰāːn krūŋ tʰōn]) is a bridge over the Chao Phraya River in Bangkok, in Thailand, connecting the districts Dusit and Bang Phlat.

The bridge has 6 spans, and consists of a steel superstructure resting on concrete piers.

Construction on the bridge began on August 31, 1954, by the Japanese company Fuji Car Manufacturing Co., Ltd., with Sahawitsawa Kan Yotha Co., Ltd. as its local representative.

The bridge has four lanes for motor vehicle traffic, two in each direction, with no divider.

Pedestrian paths 2.5 metres wide run along either side of the bridge.