Child poverty in the north of the county is costing local authorities millions of pounds a year.
The Child Poverty Action Group has published estimates of the costs to the economy and government generated by child poverty rates in every local authority area in the UK.
The number of children living below the poverty line in Corby is estimated to be 2,595, costing £28m a year.
In Kettering the figure is 2,761, costing £30m, in Wellingborough it is 2,861, costing £31m and in East Northants the estimate for children living below the poverty line is 1,968, costing £21m a year.
The figures, produced by Donald Hirsch of Loughborough University, are contained in a new report on how local authorities are trying to tackle child poverty at a time of social security cuts.
Alison Garnham, chief executive of Child Poverty Action Group, said: “Our new report will help guide authorities on the challenges they face and the actions they can take to protect families in their area against poverty; and many residents will be shocked to hear that so many local children are living in poverty.
“We hope that local campaigners will be able to use our report to encourage their local councillors to do more to end child poverty in their area and support those families who are facing the greatest hardship.”