The Hispanic and Asian populations in the United States are expected to triple by 2050, according to a new Census Bureau report.
This means Hispanic-Americans would make up nearly one-quarter of the US population, which is predicted to reach 420 million, from 282 million in 2000.
Non-Hispanic whites would make up
just 50.1% of the population in 2050, compared to 69.4% four years ago.
Overall in the US, women will continue to outnumber men, the report says.
There will be 6.9 million more females than males in
2050, compared to 5.3 million more in 2000 - when the last census was taken.
While people of Hispanic origin are the largest minority group in the United States, a recent report suggested that they suffered economically compared to other US citizens.
The study, co-produced by the Consumer Federation, showed the average Hispanic household's wealth was $11,500 against $86,000 for US households as a whole.
The Census Bureau report says that Asian-Americans, who now account for 3.8% of the US populace, would represent 8% of the population by mid-century.
Their numbers would increase from nearly 11 million to more than 33 million.
The number of Hispanic-Americans should rise from about 36 million to nearly 103 million, and their share of the US population would nearly double, from 12.6% to 24.4%, the census said.
The number of black Americans is expected to rise from 35.8 million to 61.4 million in 2050, representing a 71% increase.
Sonia Perez, of the National Council of La Raza - which advocates Hispanic interests, said: "We knew where the trend was headed.
"This is going to be the workforce that sustains us as a nation, so we can make choices today that are dramatically going to change the outlook 20 or 30 years from now."