Editing Census (section)

=== Iran ===
One of the earliest systematic censuses in world history was conducted during the early [[Achaemenid Empire|Achaemenid period]], up until the reign of [[Darius the Great|Darius The Great]] in [[History of Iran|Ancient Iran]]. This census, aimed at [[Financial plan|financial planning]], [[military organization]], and [[Revenue service|tax collection]], spanned regions across three continents: [[Asia]], [[Africa]], and [[Europe]]. It included data on population numbers, the wealth of cities and provinces ([[Satrap|Satrapies]]), precise assessments of agricultural lands, the resources of each region, and other factors critical to determining state finances and planning for governance and military operations.<ref>{{Cite book |last1=Hackl |first1=Johannes |last2=Ruffing |first2=Kai |date=2021-06-25 |chapter=Taxes and Tributes |chapter-url=https://doi.org/10.1002/9781119071860.ch67 |journal=A Companion to the Achaemenid Persian Empire |pages=965–979 |doi=10.1002/9781119071860.ch67|isbn=978-1-119-17428-8 }}</ref>

In modern [[Iran]], the first nationwide population and housing census was conducted in 1956 (1335 in the [[Iranian calendars|Iranian calendar]]), with the most recent one completed in 2016 (1395). According to Article 4 of the Iranian Statistical Center Law, this nationwide census is to be carried out every five years by order of the president. <ref>{{cite web | title=Census | website=Iran Data Portal | url=https://irandataportal.syr.edu/census}}</ref>