Colleen Corrigan-Duncan, 51, was last seen around 10:30 p.m. Monday. She told someone at her home in Sparta that she was going to McDonald's for a drink.
Her body was discovered late Tuesday afternoon a short distance from her home.
Corrigan-Duncan's family told police they were concerned about her well-being due to statements she had made in person and online.
Sparta Police Chief Andrew Milanowski said there is no sign of trauma and they do not suspect foul play. An exact cause of death is not yet known. An autopsy is scheduled for today.