The 1990 TFL Statewide League premiership season was an Australian rules football competition staged across Tasmania over 21 roster rounds and 6 finals series matches between 31 March and 22 September 1990.The League was known as the Cascade-Boags Statewide League under a dual commercial naming-rights sponsorship agreement worth A$1.08 million over the following three years with both Cascade Brewery in Hobart and Boag's Brewery in Launceston.