Alex is not the kind of celebrity who often reveals the details of his personal life. Although he’s been hosting Jeopardy! for more than three decades, most viewers likely know him only from his appearances as the show’s host. When he isn’t making the show, though, he lives in Los Angeles. His home is an almost 10,000 square foot mansion that he paid $2.15 million for years ago.
In addition to his primary residence in Los Angeles, Alex also owned a vacation home in Paso Robles, Calif. The home, which Alex sold in 2019, in light of his cancer diagnosis, was more than 2,000 square feet and overlooked Lake Nacimiento. By the time Alex and his wife sold the home, they described it as more of a burden than an inspiration.
Source : https://www.distractify.com/p/where-does-alex-trebek-live