An ambulance was called to the scene in Balfron Loan, Edinburgh, this morning and she was pronounced dead.
The death is being treated as unexplained and police appealed for information.
A Police Scotland spokesman said: “Police in Edinburgh responded to an address in Balfron Loan at around 7.30am on Thursday 13th February after a woman was found lying unconscious within a garden.
“She was subsequently pronounced dead by ambulance staff before being taken to hospital.
“Inquiries into the full circumstances surrounding this incident are ongoing and anyone who can assist officers with their investigation is asked to come forward immediately.
“The woman’s death is being treated as unexplained at this time.”