Union Valley is an unincorporated community located within Monroe Township in Middlesex County, in the U.S. state of New Jersey.Locality Search, State of New Jersey. Accessed February 15, 2015. Two large age-restricted communities lie within the settlement today, Clearbrook and Concordia. Other than those two communities, the only other buildings in the area are medical offices and facilities and some single-family homes along Union Valley Road (part of County Route 615 west of the area).
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