The study looks in detail at what will happen by 2065, but the actual tipping point comes in 2055.
An increase in Asian and Hispanic immigration also will drive US population growth, with foreign-born residents expected to make up 18 per cent of the country's projected 441 million people in 50 years, the Pew Research Center said in a report being released today.
Today, immigrants make up 14 per cent of the population, an increase from 5 per cent in 1965.
The actual change is expected to come in 2055, when Asians will become the largest immigrant group at 36 percent, compared with Hispanics at 34 per cent. White immigrants to America, 80 per cent back in 1965, will hover somewhere between 18 and 20 per cent with black immigrants in the 8 per cent to 9 per cent range, the study said.
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Pew researchers analyzed a combination of Census Bureau information and its own data to develop its projections.
Part of the reason for the shift is that the fertility rate of women in Latin America and especially Mexico has decreased, said Mark Hugo Lopez, Pew's director of Hispanic research. In Mexico, Lopez said, women are now having around two children, when back in the 1960s and 1970s, they were having about seven children per woman.
"At the same time we've seen a growing number of immigrants particularly from China or India who are coming for reasons such as pursuing a college degree or coming here to work temporarily in the high-tech sector."
Despite the increase in Asian immigrants, Hispanics will still make up a larger number inside the United States, Lopez added.