[1] He was born in 1661, the eldest son of Sir Thomas Fleetwood, 4th Baronet, of Calwick, who survived him.
He married Anne Banastre, the daughter and heiress of Christopher Banastre of Bank Hall, Lancashire, he purchased from the Mainwarings, about 1690, the manor of Marton Grange, or Marton Sands, in the same county.
[1] His land adjoined a large lake called Martin Mere, occupying an area of 3,132 acres, with a circumference of about eighteen miles which he resolved to drain.
In 1781, draining operations were resumed by Thomas Eccleston of Scarisbrick but it was not until after the middle of the 19th century that Sir Peter Hesketh succeeded in converting the tract of fertile land to profitable use.
[2] Fleetwood died 22 April 1717, and was buried at St Cuthbert's Church, Churchtown, where there is a monument to his memory eulogising his enterprise and spirit.