Organisers of the so-called Windsor Big Lunch will use a 500m-long table, seating an estimated 1,600 people, which would break the previous record set at the May International Festival in Memphis, Tennessee by 100m.
Commenting on the plan, Lisa Hunter, the event organiser said she hoped to bring together people from different elements of the community to celebrate the once-in-a-lifetime event.
She said: "We’re trying to encourage people to come together on the 5th June to say thank you to the Queen but also to neighbours, friends and people who have made a difference over the last two years.
"About 500m of picnic tables is what we’re aiming for, which works out to 1,600-and-a-few people. That’s the aim - if we can make it a bit longer then that’s fantastic, but that’s the minimum.
"The idea is for everyone in the community from all walks of life to come together in a celebration."
The event was first held last year to celebrate communities helping each other during the pandemic.
The picnic will follow the more formal, Big Jubilee Lunch, which will also be held on June 5.
Although the Queen’s official Jubilee date is on February 6, millions are expected to celebrate the event during the summer as Her Majesty, 95, celebrates 70 years on the throne.
The Bank Holiday will begin with the Trooping of the Colour at Horse Guards Parade in central London on June 2.
Beacons will also be lit across the UK, along with the Isle of Man, the Channel Islands and Overseas Territories.
A special service will then be held at St Paul’s Cathedral on June 3 before a Party At The Palace event on June 4.
Balmoral and Sandringham will also be opened up to the public to mark the long weekend.
