Morrill County Nebraska has 7 places on the National Register of Historic Places including 3 places of National significance and 1 place of Statewide significance. Significant places include Camp Clarke Bridge Site, Chimney Rock National Historic Site, Courthouse and Jail House Rocks and Mud Springs Pony Express Station Site and Morrill County Courthouse.
Prehistoric cultural affiliation(s) include Native American and Dismal River dating back to 1000.
Some of the country's most noteable architects helped create the Morrill County places including Henry T. Clarke and J.P. Eisentraut. Prominent architectural styles found in Morrill Country are Classical Revival.