Sedan is an unincorporated community in Richland Township, DeKalb County, Indiana.

Originally named Lawrence, the town's post office was first established in 1854 and referred to as Iba (or Ida).

[4] The community was likely named after Sedan, in France.

Sedan appeared as a separately-returned community in the 1870 Census, when it was reported to have a population of 176.

This DeKalb County, Indiana location article is a stub.