Arnemann (October 14, 1850 – December 10, 1917) was an American businessman and politician.
Born in Hanover, Arnemann emigrated with his parents at age five and settled in West Bend, Wisconsin.
In 1870, Arnemann started a soda water factory in Neenah, Wisconsin and was also in the ice business.
He married Mary Bruening in 1872, with whom he had 10 children; she was killed by a train in 1916.
Arnemann served on the Neenah Common Council and was mayor of Neenah.
He also served on the Winnebago County, Wisconsin Board of Supervisors.
Arnemann was a Democrat.
He served in the Wisconsin State Assembly in 1903 and from 1915 until his death in 1917.
He died unexpectedly of heart failure in Neenah, Wisconsin.