Men's cup in 2031 and women's in 2033. Dallas and Austin are possible host cities in Texas along with a number of other major cities. They're planning to use NFL stadiums for the most part.
https://www.espn.co.uk/rugby/story/_/id/33896716/us-announced-hosts-2031-2033-rugby-world-cups
https://www.espn.co.uk/rugby/story/_/id/33896716/us-announced-hosts-2031-2033-rugby-world-cups