They will have 24,915 seats for their first appearance in the final in 27 years.
Arsenal have virtually an identical amount with the FA sharing the remaining 22,000 among their member clubs.
Saints will have 5,406 tickets at £80, 12,980 at £60, 1,463 at £45 and 3,250 at £25.
In addition there are spaces in the family enclosure with 1,396 at £60, 276 at £45 and 144 at £25.
Children aged under 16 get in the family section for half price.
Season-ticket holders should receive their application forms by the weekend.
Saints members will need to have been to at least six home games this season to qualify for a ticket.