The UK population will rise to 78m by 2051, with ethnic minorities making up 20% of the total, research suggests.
Ethnic groups, which accounted for 8% of the population in 2001, will move from poor to more affluent areas and be far more integrated with the rest of the population, University of Leeds experts said.
The three-year study gives population projections for 352 English local authorities, and annual projections for Wales, Scotland and Northern Ireland for each year until 2051.
Immigration from the US, Australasia and Europe - classed as Other Whites - is expected to drive the fastest growth of the 16 groups studied, followed by India, Pakistan and Bangladesh.
White British and Irish groups are projected to see extremely slow growth.
Project leader Professor Philip Rees said: “The ethnic make-up of UK’s population is evolving significantly.
“Groups outside the white British majority are increasing in size and share, not just in the areas of initial migration, but throughout the country, and our projections suggest that this trend is set to continue through to 2051.
“At a regional level, ethnic minorities will shift out of deprived inner city areas to more affluent areas, which echoes the way white groups have migrated in the past.”