Police were called to a property in Ormrod Street in the town at about 8am on Friday.
They found the pensioner, who was pronounced dead at the scene, Greater Manchester Police said.
Samantha Nuttall, 49, has now been charged with murder, and remanded into custody.
She will appear at Manchester and Salford Magistrates Court on Monday.
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Speaking on Saturday, Detective Inspector Louise Kelly said: “I would like to express my deepest condolences to the victim’s family and loved ones as they navigate through this loss.
“They will continue to be supported by our specialist officers during this difficult time.”
