Thong Lo, officially named Soi Sukhumvit 55, is a road and neighbourhood in Watthana District, Bangkok, Thailand. Thong Lo literally translates as 'molten gold'. Its name comes from that of a naval officer, Thonglo Khamhiran, a member of the Khana Ratsadon, a 1932 revolutionary group. He owned land and houses in the area. In pre-World War II Thailand, the area along Sukhumvit Road to the Bang Na District was suburban Bangkok and quasi-rural. Much of the area was occupied by the navy.