It is called census.
Enumeration is one possible answer. The census is another.
U.S. Census
A count of the population in particular areas is called a census. It typically records various details of individuals in a family.
A count of the population in particular areas is called a census. It typically records various details of individuals in a family.
Enumeration -Census (edit)
This is called the US Census.
The census
A formal count of a population is a census.
Idm
The US officially counts its population every 10 years through the decennial census conducted by the Census Bureau.
census.
In the US the population is counted on every year that ends with a zero, or every ten years, through the conduction of a census.