Julius H. Dennhardt (February 5, 1869 – March 19, 1929) was an American auctioneer, businessman, and politician.
Born in Naumberg, Saxony in what is now Germany, Dennhardt emigrated to the United States and settled in Wisconsin as a young man.
Dennhardt served in the Wisconsin State Assembly in 1911 and was a Republican.
Dennhardt died of a stroke in Neenah, Wisconsin.
This article about a Republican Party member of the Wisconsin State Assembly born in the 1860s is a stub.