Beaver County Coroner Teri Tatalovich-Rossi says the victim is 68-year-old Patricia Parisi.
Officials in Big Beaver have suspected that since her house caught fire about 2 a.m. Thursday, but dental records and other means had to be used to confirm that.
The coroner says the exact cause of the woman's death is still unclear because the condition of her body has made it difficult to pinpoint.
A man who lived at the home has been hospitalized for burns and smoke inhalation, but his condition was not immediately available Tuesday.
Big Beaver is about 30 miles northwest of Pittsburgh.