New estimates put the U.S. undocumented immigrant population in mid-2024 at 14.6 million to 15.8 million, a sharp increase from around 11 million in the 2010s. Another group, The Center for Migration Studies of New York, estimated the undocumented population at 14.6 million for 2024. Non-citizens could be legal immigrants on visas or awaiting citizenship, as well as undocumented immigrants. Image © iStock - ronniechuaThe Center for Migration Studies in January called the DHS claim a “self-serving fantasy” based on a “flawed analysis of the Census Bureau’s monthly Current Population Survey.” Most likely the lower numbers in the survey reflect an unwillingness by immigrants to cooperate with surveys like the Current Population Survey, the January report said.