Nordegren's purchase of Fåglarögård was first reported by the Aftonbladet newspaper on December 3rd, just days after Woods crashed his SUV into a tree near the Florida home he shares with Nordegren and their two children.
On Sunday, Sten-Åke Johansson, head of Fåglarö's residents association, confirmed the sale to AFP.
"Elin Nordegren bought a house on the island, it's true. She's the owner since December 1st," he told the news agency.
There are around 140 properties on Fåglarö, which is about 40 kilometres southeast of the Swedish capital.
"The property consists of several houses, it's a renovated farm, on the water with a beach," Johansson said.
According to Aftonbladet the 24,000-square-metre property with swimming pool was sold for 16 million kronor ($2.2 million).
Johansson could not confirm the selling price or say whether billionaire golfer Woods himself was involved in the transaction.
Woods announced Friday he was taking a hiatus from professional golf and admitted he had cheated on Nordegren after reports that 10 women had claimed to have had sexual relationships with the 14-time major champion.
World number one Woods, who has a son and daughter with Elin, said he wanted to work on being a better husband, father and person.
Women such as a show club hostess, pancake restaurant waitress, porn star and cocktail waitress have alleged affairs with Woods, whose squeaky-clean image was shattered.
"I am deeply aware of the disappointment and hurt that my infidelity has caused to so many people, most of all my wife and children. I want to say again to everyone that I am profoundly sorry and that I ask forgiveness," Woods said.