How the Census Bureau ensures complete and accurate data

Once a decade we count everyone living in the United States in the decennial census, as we have done every ten years since 1790. Trying to count all Americans once—and only once—and in the right place is a herculean task. Although we talk about the Census in reference to Census Day (April 1, 2020), the process of counting all Americans begins years before Census Day and continues for years...

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