The bodies were found Wednesday night in Antrim County's Custer Township, near Mancelona.
Antrim County Sheriff Dan Bean said it is unknown if either man had wounds or trauma. Autopsies are planned Friday at Spectrum Health Blodgett Hospital in Grand Rapids.
Bean said the men's clothing was tattered and was decomposing after one of Michigan's coldest and snowiest winters ever. He said the tent didn't have a heater.
The sheriff said there are no missing people cases in the county that match the men.