What is the term for the national population count conducted every ten years?

The correct term for the national population count conducted every ten years is known as the decennial census. This process is mandated by the U.S. Constitution and provides essential information about the country's demographic makeup, including population size, distribution, and various social and economic characteristics. The decennial census plays a critical role in determining legislative representation, allocating federal funds, and guiding government policies. The systematic nature of the census ensures that the data collected is comprehensive and reflects the entire nation, making it a vital tool for understanding and responding to the needs of the population.

Other terms, such as "National Register," "population survey," and "demographic assessment," do not accurately describe the formal and structured process of this ten-year count and are used in different contexts relating to population and demographics.