Fratton Park is a football ground in Portsmouth, Portsea Island, England and is the home of Portsmouth F.C. Fratton Park's location on Portsea Island is unique in English professional football, as it is the only professional English football ground not located on the mainland of Great Britain. Fratton Park has been the only home football ground in Portsmouth FC's entire history. Fratton Park was built in 1899 by Alfred H. Wikipedia