A census was an official numbering of people or households. Scripture records enumerations of Israel, foreign residents, returned exiles, and a Roman enrollment during the time of Jesus’ birth.
Israel was numbered after the Exodus, before entering Canaan, during David’s reign, and after the Exile. Solomon numbered foreign workers, and the Roman government conducted an enrollment during the Lord’s birth.
The recorded censuses served purposes of military, administrative, labor, communal, or imperial enrollment. Their totals and circumstances differ according to the population counted.