Gilliam County Oregon (Historic Districts) has 2 places on the National Register of Historic Places.
Some of the country's most noteable architects helped create the Gilliam County places including Tourtellote and Hummel. Prominent architectural styles found in Gilliam Country are Early Commercial and Italianate.
Condon Commercial Historic District
(added 1998 - - #98000609)
Roughly bounded by Ward, Spring,and Oregon Sts.,and mid-block between Walnut and Frazier Sts. , Condon