The 2018–19 Latvian–Estonian Basketball League, known as OlyBet Latvian–Estonian Basketball League for sponsorship reasons, was the inaugural season of the newly formed Latvian–Estonian Basketball League, the combined top basketball division of Latvia and Estonia. The season began on 28 September 2018, with the 2018 Estonian champions Kalev/Cramo hosting a game against the 2018 Latvian champions Ventspils. The Final Four was played at the Saku Suurhall in Tallinn, Estonia, with Ventspils winning the inaugural title.