Hamburg is an unincorporated community in Ray Township, Franklin County, Indiana.
Hamburg was platted in 1864 by Wesley Martin. It was named after Hamburg, in Germany.
Hamburg was once a thriving Catholic community. St. Ann's Catholic Church was founded in Hamburg in 1869. The Church closed its doors in 2013 merging with Holy Family Parish in Oldenburg.
A post office was established at Hamburg in 1867, and remained in operation until it was discontinued in 1929.
During the Super Outbreak on April 3, 1974, a tornado destroyed 90% of the town.