The fastest growing ethnic group in the US is the Hispanic group. They have great influence and have managed to marry within their own group and continue to give birth.
In an announcement released on June 23, 2016, the US Census Bureau stated that the fastest growing minority group in the USA was the Asian group. Most of the new immigrants have come to the US from China. The growth in the Asian population replaced that of Hispanic immigrants.
Multi-racial
hispanic and african american
Hispanics are the fastest growing minority group in the US.
Irish is the second largest ethnic group (after German) in the United States with just less than 1/3 of Americans claiming Irish ancestry.
Hispanic
german and usa
Germans
In order for us to answer your question we would need more information in regards to where the ethnic groups are located, or the reason for distinguishing between ethnic groups.
Practically every ethnic group imaginable is in the US. The largest ethnic groups include German, Irish, African-American, English, Mexican, Italian, Polish, French, Native American, Scottish, Dutch, Norwegian, Swedish. Other minorities include Russian, Chinese, Japanese, Ukrainian, Korean, Canadian, Cuban, Spanish, Brazilian, and Salvadorian.
California is the biggest U.S. state based on population. New York City is the biggest U.S. city based on population.
We all are to some degree. More so I think in how the group we are raised in views the ethnic group we come from. How a group is portrayed in the media is also going to effect how we see ourselves. Being from any given ethnic group does not in and of itself make us do or become something.