St. Rose, Ohio
St. Rose is an unincorporated community in Mercer County, in the U.S. state of Ohio.
St. Rose was platted in 1854. A post office called Saint Rosa was established in 1878, and remained in operation until 1905.
Coordinates: 40°24′27″N 84°31′00″W / 40.40750°N 84.51667°W
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