The U.S. ranks 145th in slavery

According to the Global Slavery Index, 2014, an estimated 0.019% of all the people in the United States are held in slavery. That is enough to make the United States rank one hundred forty-fifth out of one hundred sixty-seven countries ranked in that category. Mauritania ranks first, with an estimated 4% of its people held in slavery.

Table taken from http://d3mj66ag90b5fy.cloudfront.net/wp-content/uploads/2014/11/Global_Slavery_Index_2014_final_lowres.pdf

The U.S. ranks 67th in slavery

According to the Global Slavery Index, 2014, there are an estimated 60,100 people held in slavery in the United States. That is enough to make the United States rank sixty-seventh out of one hundred sixty-seven countries ranked in that category. India ranks first, with an estimated 14,285,700 people held in slavery.

Taken from Global Slavery Index, 2014
http://d3mj66ag90b5fy.cloudfront.net/wp-content/uploads/2014/11/Global_Slavery_Index_2014_final_lowres.pdf

The U.S. ranks 134th in prevalence of slavery

According to the Global Slavery Index, there are an estimated 59,644 enslaved people living in the United States out of a total population of 313,914,040. That is enough to make the United States rank one hundred thirty-fourth out of one hundred sixty-two countries ranked in the prevalence of slavery. Mauritania ranks first, with an enslaved population of 151,353 out of 3,796,141 total population.