Hemenway is an unincorporated community in southeastern Ripley County, in the U.S. state of Missouri.

The community is located on Missouri Route H, 1.5 miles northeast of Torch.Missouri Atlas & Gazetteer, DeLorme, 1998, First edition, p. 66,

History A post office called Hemenway was established in 1907, and remained in operation until 1920. The community was named after James A. Hemenway, a legislator from Indiana, the native state of a first settler. A variant name was "Riga".

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