Martin County, Indiana: History
The Indiana Territory achieved statehood near the end of 1816. Shortly thereafter, the new state legislature created Dubois (December 1817) and Daviess (February 1818) counties. Due to the inflow of settlers into southwest Indiana, and the difficulty of accessing the county seats of those counties, Martin County was partitioned off from parts of those counties, being authorized on January 20, 1820. It was named for Maj. John T. Martin of Newport, Kentucky.