I am assuming you mean the United States. The third largest ethnic group in the US is African-American. Although technically not a single ethnic group, African-American is defined as one in the American census. It is preceded by German and Irish.
India is the third largest country in Asia.
Sweden is not the third largest country by area or population. It is the fourth largest country in europe, after spain.
Kurds are the second largest ethnic group in TURKEY(after Turks) and in IRAQ and SYRIA (after Arabs). In Iran, Kurds are the third largest ethnic group behind Persians and Azeris.
The United States is the third largest country with an area of 9,826,675 km2.
The third largest Southern European country is Italy.
The third largest country in Europe is Turkey, if including transcontinental countries. The third largest country wholly in Europe is Spain.
The third largest country on earth is The United States of America.. the largest is Russia then comes Canada..
The United States is the third largest country by both area and population.
China has the third-largest land area of any country and the largest population of any country.
The United States is the third largest country by both area and population.
By area, India is the third largest Asian country (after Russia and China).
ME!