The largest Vietnamese population in the United States is in California.

Texas.

Florida.

New York.

California has the most vietnamese people in the United States.

The largest Vietnamese population in the United States is in California.

Explanation:

There are more than 2 million people in the United States who identify themselves as Vietnamese Americans; 40% of them live in California and 12% in Texas.

Vietnamese American mostly arrived to California. Cities like San Jose, Garden Grove, Westminster and San Diego have large groups of Vietnamese Americans within its populations. Also a great group of Vietnamese people settled in Texas, mainly in Houston.