Harrison County Mississippi (Historic Districts) has 21 places on the National Register of Historic Places including 1 place of National significance. Significant places include Scenic Drive Historic District, Biloxi Downtown Historic District, Biloxi Downtown Historic District (Boundary Increase), Biloxi Veterans Administration Medical Center and Broadmoor Place Historic District.
Some of the country's most noteable architects helped create the Harrison County places including et al., Tom White, Hamilton Brothers and Company, Milton Baxter Ellis Hill, Veterans Administration, William T. Harkness, builder A. G. Darden and Shaw and Woleben. Prominent architectural styles found in Harrison Country are Bungalow/Craftsman, Colonial Revival and Classical Revival.