Clem is an unincorporated community in Gilliam County, Oregon, United States, at an elevation of 1,903 feet (580 m). It was named for Clemens Augustus Danneman, who was born in Germany, came to Oregon in 1879, and owned a ranch in Gilliam County. The Clem post office was open between November 1884 and April 1937. Clem "also was a station on the Condon branch of the Union Pacific Railroad." Now, Clem is on Oregon Route 19 about 4 miles (6.4 km) southeast of Mikkalo.
- U.S. Geological Survey Geographic Names Information System: Clem, Oregon
- McArthur, Lewis A.; McArthur, Lewis L. (2003) . Oregon Geographic Names (7th ed.). Portland, Oregon: Oregon Historical Society Press. p. 209. ISBN 978-0875952772.
- U.S. Geological Survey Geographic Names Information System: Clem Post Office
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