Deandale is an unincorporated community in Steubenville Township, Jefferson County, Ohio, United States. It is located about south of Mingo Junction along Ohio State Route 7.Rand McNally, The Road Atlas '06, Chicago, 2006, p.78
Located along the Ohio River, Deandale was described as a hamlet in 1910.Doyle, Joseph Beatty, 20th Century History of Steubenville and Jefferson County, Ohio and Representative Citizens, Richmond-Arnold Publishing Company, 1910, Pg. 445. The Ohio Valley Brass and Iron Company built a foundry there in 1911.American Machinist, Volume 34, McGraw-Hill, 1911, Pg. 1000.
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