They show there has been a sharp rise in the number of schools in England where more than half of pupils have a foreign language as their mother tongue.
The statistics released by the Department for Children, Schools and Families show that in 1997, the year Labour came to power, half the pupils in 866 schools spoke English as a second language.
Around one in seven - almost 500,000 - primary pupils and just over one in ten, or 364,000 secondary students do not speak English as their first language (file picture)
Around one in seven - almost 500,000 --primary pupils and just over one in ten, or 364,000, secondary students do not speak English as their first language.
Critics said last night that the figures were another sign of the impact of Labour's open door on immigration and that they risked hampering integration.
They also claimed that the data has serious implications for already-stretched school resources.
The statistics also reveal that the impact of immigration has not been spread evenly across the country. London - often the first point of call for immigrants - has been the hardest hit.
Birmingham has 116 schools where more than 50 per cent of pupils have English as a second language, while in Bradford the figure is 60, in Leicester 34, Manchester 33, Lancashire 30, and Kirklees 30.