Prehistoric cultural affiliation(s) include Glacial Kame dating back to 2999 BC.
The famous person Andrew Carnegie is associated with one of more of the Hardin County historic places.
Some of the country's most noteable architects helped create the Hardin County places including McCarty & Bulford Richards, Richards,McCarty, & Bulford and Pennsylvania RR. Prominent architectural styles found in Hardin Country are Late Victorian, Classical Revival and Gothic.