From Business Insider:
We recently looked at the dominant languages in each of NYC's neighborhoods. Now, we're taking a look at New Yorkers' ancestral backgrounds.
The American Community Survey is a massive annual effort by the Census Bureau to understand the citizens of the United States. Over three million people per year are asked questions about housing, demographics, and economics.
In one of the many questions on the ACS, respondents are asked to identify their ancestry. This is a very open-ended question, and the Census Bureau provides numerous options. Here are the most common ancestries in each NYC neighborhood.