The Winslow–Haskell Mansion, also known locally as The Castle, is a historic house at 53 Vista Avenue in Newton, Massachusetts.

The early construction included Gothic pointed-arch windows and vergeboard trim.

Later work added Queen Anne styling, including the three-story tower, with polychrome roofing and cement-like wall surfacing.

The house was purchased in 1872 by Edwin Haskell, owner of the Boston Herald.

This article about a Registered Historic Place in Newton, Massachusetts is a stub.