Immigrants compose an increasingly large share of the U.S. labor force and growing share of low-wage workers. Immigrants' hourly wages are lower on average than those for natives. Immigrant workers are much more likely than native workers to drop out of high school. Three-fourths of all U.S. workers with less than a ninth grade education are immigrants. Nearly two-thirds of low-wage immigrant workers do not speak English proficiently, and most of these workers have little formal education. Two of every five low-wage immigrant workers are undocumented. While the low-wage native labor force is mainly female, men dominate the low-wage immigrant labor force. Even though they are less likely to participate in the labor force, female immigrant workers are better educated and more likely to be in the country legally than male immigrants. Foreign-born women earn substantially lower wages than foreign-born men and native women. Although immigrants dominate a few low-wage occupations, such as farming and private household work, immigrants in these occupations represent a small share of all immigrant workers. There are more foreign-born workers in low-skilled manufacturing and services. (SM)