Roger Jonathon Reinert is an American politician, mayor of Duluth, Minnesota, and member of the Minnesota Democratic–Farmer–Labor Party (DFL). He served in the Minnesota House from 2009 to 2011 and the Minnesota Senate from 2011 to 2017.

Olivia is the county seat of Renville County, Minnesota, United States. Its population was 2,484 at the 2010 census.