Nearly one-third of the population in 2050 will be Latino, predicts a study by the Pew Research Center. That's up from 14 percent in 2005.

Whites on the other hand, will drop to 47 percent, down from about two-thirds now.

The country's population will climb from 303 million today to 438 million by 2050, according to the study.

Eighty-two percent of the increase in population will be due to the arrival of legal and illegal immigrants as well as their U.S.-born descendants, according to the projections.

The study released last week also said the black share will hold steady at 13 percent while Asian residents will rise from 5 percent to 9 percent.

The center's projections indicate that nearly one in five Americans will be foreign-born in 2050, surpassing the historic peaks for immigrants as a share of the population.

The previous highs were 14.8 percent in 1890 and 14.7 percent in 1910.

Some groups see the increase as negatively affecting the economy, housing, education, health care, the environment and other quality-of-life measures.

"It just indicates what an enormous impact immigration is going to have in the future of this country," said Ira Mehlman, spokesman for the Federation for American Immigration Reform, which favors sharply reduced immigration levels. "The sheer growth is going to have an impact on just about everything that is important to the people in this country."