In 2008-10, 16.5 million civilian men nationwide age 18-44 lived in families with incomes below 200 percent of the federal poverty level; 15 million of these men lacked college degrees. Low-income men are more likely to have never married than men the same age nationwide, and they are disproportionately African American or Hispanic. Using data from the American Community Survey, this brief presents estimates of the number of low-income men in the 50 states and the District of Columbia, focusing on metropolitan areas with at least 50,000 low-income men.