Bon Air Manor or Benson's Park is a historic plantation home in Ellicott City, Howard County, Maryland.

The Bon Air Manor is a historic gatehouse to the original Benson's Park Manor.

The property was later expanded to 268 acres.

[1] The gatehouse was part of a complex of outbuildings including a barn, stone jail, and slave quarters built in 1805.

The property adjacent to the New Cut Landfill has been subdivided for residential development and reduced in size.