More than 20,000 children have failed to get into their first choice school in London
That means that two out of ten children starting primary school in September will not be going to their preferred school.
In total, 6,000 children missed out on all of their school choices, either because their parents listed only one school, or because of huge demand for the six they chose.
Of those, 4,700 have been offered a place at an alternative school and 1,500 currently have no place. Parents in this situation will be advised of their options by their local authority.
The Pan London Admissions Board says that there is unprecedented demand for primary school places across London.
A total of 100,000 children applied this year - an increase of 6,000 since 2011.
Chairman Helen Jenner said: "It is important to emphasise that although the system is very efficient, it cannot create places at schools which are already full and not all parents can be offered their first preference.
"London local authorities are working hard to try to ensure that they can offer every child a school place but with this surge in demand it is becoming increasingly difficult.”
Kensington and Chelsea is at the bottom of the table, with 35 percent of children missing out on their first choice. But Tower Hamlets came out on top with only 14 percent being disappointed.