Officers were called out to the Kinneddar Park area of Saline after a woman’s body was found shortly after 4.50pm on Wednesday.
Formal identification of the body has not been made.
A police spokesman said: "We were made aware of concern for a woman at Kinneddar Park area of Saline shortly after 4.50pm on Wednesday, 10 March.
"Emergency services attended but the 57-year-old woman was pronounced dead at the scene.
"Her death is being treated as unexplained but non-suspicious. A report will be submitted to the Procurator Fiscal in due course."