List of Portsmouth F.C. seasons

This is a list of seasons played by Portsmouth Football Club in English and European football, from 1899 (the year of the club's first FA Cup entry and elected straight into the first division of the Southern League) to the most recent completed season.

While Conan Doyle did play as AC Smith for an amateur side, Portsmouth Association Football Club, that flourished from 1883 to 1896, the first goalkeeper of the professional era was Matt Reilly who previously played for the successful Royal Artillery team.

were formed on 5 April 1898 and coincidentally "replaced" the Royal Artillery Portsmouth club which had "retired" in 1899 after a professionalism scandal.

The 1906–07 season was highlighted by the visit of Manchester United to Fratton Park in the FA Cup, which generated a record attendance of 24,329.

However, this record attendance was surpassed two seasons later when Sheffield Wednesday visited Fratton for the second round of the new FA Cup.