As of my last knowledge update in September 2021, the largest pickleball tournament in the United States was the U.S. Open Pickleball Championships. This tournament is held annually in Naples, Florida, and it attracts a large number of participants from around the world. The U.S. Open Pickleball Championships typically features a wide range of competitive events, including men’s and women’s singles, doubles, and mixed doubles in various age and skill categories.
Over 3,000 players competed in The OPEN in 2023. And 40,000 people watched, partied, and celebrated the sport.
Please note that the pickleball landscape can change, and new tournaments may have emerged. It’s advisable to check the latest information and rankings from the official websites of pickleball organizations and tournament organizers for the most current information on the largest pickleball tournaments in the United States.