North Wales Fire and Rescue Service received a report of a fire in a bungalow in Carrog near Corwen at 3.29pm today (Thursday).
A fire service statement says: "Crews from Llangollen used two sets of breathing apparatus and one hose reel jet to enter the property.
"Sadly, the body of a 93-year-old female was found in the property.
"A joint investigation by North Wales Fire and Rescue Service and North Wales Police is now underway.
"There are no more details available at present."