The operator recently acquired MRG Group, which includes Mr Green and Redbet brands.
Its sportsbook, powered by Kambi, will include William Hill’s “Bet Builder”, as well as odds on local Swedish sports such as trotting, ice hockey, bandy and other winter sports.
The new site will also offer an array of slots and table games, which will include live casino, Vegas Speed Roulette, Monopoly Live and Lightning Roulette.
Patrick Jonker, William Hill’s International MD, said: “This is an important milestone in William Hill’s international journey. Through fantastic teamwork between our teams in Malta, UK and Sweden we have released William Hill’s first new locally licensed offering since 2011.”