Asians are one of the fastest-growing minority populations groups in the United States.

According to the U.S. Census Bureau, of the total population of 304-million (as of July 1, 2008), 13.5-million people (4.5 percent of the total) described themselves as Asian. A total of 15.5-million people (5.1 percent of total) described themselves as Asian or part-Asian.

Between 2000 and 2008, the Asian-American population grew up 26.8 percent, or more than thrice the 7.8 percent growth rate of the nation as a whole.

The Western region of the U.S. has by far the largest number of Asians, accounting for about 10 percent of the total population. The Midwest and South have the lowest proportion (under 5 percent).

However, the growth rate of Asians in the South has surged by 43.5 percent since 2000, and by 29.8 percent in the Midwest (faster than the corresponding rates in the Northeast and the West).

By far, California had the largest Asian population of any state (nearly 5.1 million), with New York (1.4-million) at a distance second.

Hawaii is the only state in the union where Asians form a majority of the population (54 percent).

Here are the five counties in the U.S. with the largest number of Asian residents.