Fort Jefferson, OhioFort Jefferson is an unincorporated community in Darke County, in the U.S. state of Ohio.[1] HistoryA post office called Fort Jefferson was established in 1823, and remained in operation until 1906.[2] A memorial to historic Fort Jefferson is located there.[3] References
40°01′35″N 84°39′19″W / 40.02639°N 84.65528°W
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