How aften did ancient Rome order a census?

Answer 1

The census was an income assessment for taxation purposes as well as a head count. Before military service became voluntary it was used the get the names of the men of military ages (17 to 45) for the draft.

Answer 2

The census in ancient Rome was taken every five years in some way or another. The census was important to the Romans because the tax base and estimated revenues were calculated from the numbers in the census.

Answer 3

The roman census was normally taken every five years