The United States has always been a nation of immigrants. Some 14% of U.S. residents today were born outside of the country, and 93% identify with an ancestry other than American.
On its annual American Community Survey, the U.S. Census Bureau asks Americans to identify their ancestry. Ancestry refers to a person’s lineage or ethnic origin. Ethnic composition varies heavily across the United States and is often a reflection of centuries-old migration patterns. Every state has a unique ethnic community whose history can in many cases be traced back hundreds of years.
To determine the most unusual ancestry in every state, 24/7 Wall St. reviewed data from the ACS on the 121 most commonly reported ancestries. The ancestry with the largest share of respondents in a state relative to the national share — a calculation known as the location quotient — is defined as the most unusual ancestry.