A 65-year-old woman was found dead in a pool of blood in the bedroom of her opulent Upper West Side apartment, authorities said.

Linda MacDonald died in an accidental fall, said law-enforcement sources. She was found Friday night by her husband, Stephen MacDonald, in their three-bedroom home on West End Avenue at West 75th Street.

Stephen, a lawyer, is ­cooperating with law enforcement, sources said.

A building worker said neighbors have made ­“numerous calls” about the woman over her mental health and alcohol problems.

The woman was once found passed out with her feet on her neighbor’s door and a gash on her leg, the worker said.