Union 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 Union County places including Charles Miller and Calvin Thornton. Prominent architectural styles found in Union Country are Italianate, Early Commercial and Second Empire.
La Grande Commercial Historic District
(added 2001 - - #01000933)
Roughly bounded by UP RR tracts along Jefferson St., Greenwood and Cove Sts., Washington St., & Fourth St. , La Grande