1898–99 Southern Football League
The 1898–99 season was the fifth in the history of the Southern League. This season saw the expansion of Division One up to 14 teams and the creation of Division Two South-West, though it was disbanded at the end of the season after all its clubs left. No Southern League clubs applied for promotion to the Football League.
Southampton were Division One champions for the third season in a row. Overall Division Two champions being decided in a playoff in which Thames Ironworks defeated Cowes 3-1 at The Den.
Division One
A total of 14 teams contest the division, including ten sides from the previous season and four new teams.Teams promoted from 1897-98 Division Two:
- Royal Artillery Portsmouth - test matches winners
- Warmley - test matches winners
- Bedminster
- Brighton United
Division Two London
Division Two London was formed on the basis of the previous season's Division Two. A total of 12 teams contest the division, including eight sides from the previous season and four new teams.Team relegated from Division One:
- Wolverton L&NWR - test matches losers
- Thames Ironworks - London League winners
- Brentford
- Fulham