Police said on Sunday at around 10:30 p.m. officers located the body in a densely wooded area near Concession Road 9 and Sideline 28.
“The death is being treated as suspicious,” police said in a news release on Monday morning.
Forensics were called in and a post-mortem examination of the woman will be conducted to confirm her identity and cause of death.
In an update Monday afternoon, police said they have charged a woman from Clarington with second-degree murder.
A residence was secured on Fairway Drive, near Wilmot Creek, in Clarington for evidence, police said.
The identity of the woman charged and of the victim were not released.
Anyone with information is asked to call the major crime homicide unit at 1-888-579-1520. ext. 5247.