Served on the Iowa Supreme Court from May 8, 1894, when he was appointed in compliance with a legislative Act increasing the personnel from five to six members, until February 26, 1917. For four years he was Chief Justice.
Born September 24, 1858, at Bourbon, Marshall County, Indiana. In 1866 the family moved to West Liberty, Iowa. Justice Deemer was graduated in 1879 from the University of Iowa Law Department. The same year he entered upon the practice of law at Red Oak. In 1886 he was elected Judge of the District Court at the age of twenty-eight. Justice Deemer's service on the court was one of the longest in its history, although he died while still in middle life.
He was the author of several books and papers and was a lecturer on law at the University of Iowa.
Justice Deemer died at Red Oak February 26, 1917, while a member of the court.