Population in the North has risen to nearly one-and-three-quarter million people, largely due to migration from abroad.
The latest figures show the population rose by about 17,000 between mid-2005 and mid-2006.
Around 9,000 of this figure is made up of migrants from outside Britain, while 1,000 people have also migrated from elsewhere in the UK.
This is the first time that migration has contributed more to population growth in the North than the natural increase caused by a higher number of births than deaths.