U.S. Immigrant Population At Its Highest Since 1920 As 13% Are Foreign-Born EMILY ANNE EPSTEIN 11 May 2012 According to a new report by the U.S. Census Bureau, there were 40 million foreign-born people living in the country in 2010 - the highest percentage of the total population since 1920. Just a decade earlier, only 31 million people, or 11 per cent of the population, residing in the country were born elsewhere. While foreign-born residents resided in every state, more than half lived in just the 'gateway' states: California, New York, Texas and Florida. United: According to a new report...