The 1999 Speedway Conference League was the third tier/division of British speedway.
The title was won by Newport Mavericks, the junior club belonging to the Newport Wasps.
The 1999 Conference League Knockout Cup was the second edition of the Knockout Cup for tier three teams. St Austell Gulls were the winners for the second successive year.
First round
Semi-finals
Jonathan Swales won the Riders' Championship. The final was held on 14 August at Mildenhall Stadium.