Morgan County Ohio has 6 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Big Bottom Massacre Site, Adams Covered Bridge, Barkhurst Mill Covered Bridge, Helmick Mill Covered Bridge and McConnelsville Historic District.
Some of the country's most noteable architects helped create the Morgan County places including John Shrake, Williams P. Johnson, Joseph Hatfiled, Samuel Price and E.W. Kirby. Prominent architectural styles found in Morgan Country are Italianate and Queen Anne.