While fans will be keen to cheer on their favorite stars and experience everything that the 2025 US Open has to offer, they will need to keep a few rules in mind in order to make the most out of their trip. As is the case with any big event, the organizers of the season's final Major have also laid down a few rules with regards to what spectators are allowed to bring inside the premises.
For starters, visitors are allowed to carry only one bag with them, with the dimensions of the bag being 12'W x 12'H x 12'L. A larger bag may be allowed on medical grounds. There is no storage facility within the grounds, though there's one right outside the tournament complex, which can be accessed for a nominal fee.
Backpacks can't be brought inside, though a single-compartment drawstring bag is allowed. Fans can only bring their own bottles if they're made of reusable metal or plastic, and they should be 24oz or less. Hard coolers and containers are also banned, along with sealed packages of any kind, glass bottles, containers, and cans.
Cell phones are a necessity and allowed in, but professional cameras and video recording equipment are prohibited. Computers and laptops are also on the no-list. Fans cannot bring their own alcohol or drinks with alcohol mixed in them. Weapons and fireworks of any kind are naturally barred, as are laser pointing devices and drones.
Animals, except for service animals, are prohibited on the grounds. Skateboards, rollerblades, scooters, and bicycles are also not allowed inside. Flags, signs, and unapproved pamphlets are prohibited, along with glitter, confetti, or any other object that could be potentially distracting to players.
Inappropriate clothing or accessories are a strict no-no. While fans may want to capture their experience at the US Open, selfie sticks and other telescopic devices aren't allowed inside. This list isn't exhaustive, and can be amended at any time by the authorities.
The US Open organizers have the sole discretion to amend the list of prohibited items

The US Open personnel have the sole discretion to deem any items as disruptive, dangerous, or inappropriate. While they have made a rather long list of what's allowed inside and what isn't, it ultimately depends on the organizer's discretion on what fulfills their criteria.
Given the huge crowds and the time it takes to inspect the visitors' belongings, fans are advised to arrive well in advance in order to clear the security checks. All bags will be subject to screening upon arrival, with no exceptions.
The tournament organizers have also advised fans to use mass transit as much as possible. With the rules and regulations sorted, fans can now focus on having a blast at the US Open.