Blue ash, Fraxinus quadrangulata, is a species of ash native primarily to the Midwestern United States. Blue Ash may also refer to: Fraxinus pennsylvanica, a tree native to eastern and central North America Blue Ash, Ohio, a city located in Hamilton County, Ohio Blue Ash Air Station, an Air National Guard facility located in Blue Ash, Ohio Blue Ash (band), a band in the United States See also Blue tree (disambiguation) Ash (disambiguation)