History of production of population data
History of data production on population in Iran dates back to Gajar period when some discontinuous efforts were made often on ah hoc basis in 1297 the civil Registration Department was established to register the four vital events.
By the approval of a statute in 1303, the responsibility of collection of required information was entrusted to the Ministry of the Interior. Under going several changes in 1307, the statue was legally approved by the former National Consultative Assembly and Civil Registration Department was renamed "General Department of Statistics and Registration". The Department has continued its legal duties since 1349 under the revised title of "National Organization for Civil Registration".
Approval of the first Census act by the National Consultative Assembly in 1318 led to the implementation of the first population census in Tehran in the month of Esfand of the same year and in 33 more cities during the years 1319 and 1320. The project was delayed because of the 1320 political events. In Esfand 1331, the general Statistics Cooperation Organization was formed and in Farvardin 1332, the census and Statistics Act was approved. In the same year, after detaching from the General Department of Statistics and Registration and joining the General Statistics Cooperation Organization, the Department of Census and Statistics undertook the responsibility of data collection exclusively. This Organization was renamed the "General Department of Public statistics" affiliated to the Ministry of the Interior in 1334 and conducted the first National Census of Population and Housing in 1335. The increasing need of planning organizations for information and statistics as well as the need for a close cooperation between the main data producing organization and planning organizations led to the detachment of the General Department of Public Statistics from the Ministry of the Interior and its affiliation to the plan and budget organization under the title of the Statistical Centre of Iran (SCI) in 1344. As its first major activity, The SCI conducted a National Census of Population and Housing in 1345. The establishment act of the SCI was revised in 1353 and current Act of the SCI was approved afterwards.
The 1345 census enjoys some features which distinguish in from the previous. The 1385 Census is the first national census in which the method "census mixed with sampling" was used. The other feature of the 1385 census is to use Intelligent Character Recognition System which allows direct capture of images from questionnaires and translation of images into data in data processing of the census.
· Census in 1335- 1385
Number of population, number of households, private unsettled households, religion, citizenship, employed population, by major industry groups, unemployed population. Education level, literacy status, number of housing units and the facilities in housing unit, type of tenure of housing unit, by total country provinces and sub-provinces and urban and rural areas.
· The census of tribal households socio-economic characteristics
Number of tribal population and households in the summer and winter quarters at total country level, provinces and rural agglomeration.
· Vital events (marriage, divorce, birth and death)
· Population Estimates
Major surveys and censuses conducted
Type of activity, survey or census
The first general census act
Ministry of the interior general dept of public statistics
First general census
Second general census of population & housing
Third general census of population & housing
Fourth general census of population & housing after Islamic revolution
Census of tribal households socio-economic characteristics
Results of the households socio-economic characteristics survey
The households socio-economic characteristics survey
Census with sampling
Current population survey
Fifth general census of population & housing
Six general census of population & housing
Selected Findings of National Population and Housing Census, 2011