__1904 :__ The first estimate of the population of Qatar and was mentioned in the (Gulf Index) to the traveler J. G. Lorimer and the population of Qatar at that time was estimated on the basis of certain criteria by 27,000 people.

__1970 :__ The first census was conducted in 1970 and it was implemented by a foreign company where the population was (111,133) inhabitants as a result of the fast growth of the country, the number of males (71,714) and females (39,419) and the number of Qatari nationals individuals was (45,039) people, along with the number of Qatari male and (22668) female (22371) Qatari people and the total number of those in the labor force (Ability to work) was been (48,390) inhabitants including (8.168) Qatari nationals.

__1986 :__ On 16th March this year, the first total census of buildings, housing units, households and establishments was conducted, this process is one of the largest statistical operations carried out by the Central Bureau of Statistics issued the first results Bcildin contains results of a census of buildings, residential units, families and the other containing the results of the census facilities. The number of population at that time was (369,079) male and (247,852) female (121,227) people, followed by a census in 1997 and 2004 census.

__1997 :__ On 16th March this year, conducted a comprehensive census of the second census of buildings and housing units, households and establishments where the total population at that time, (522,023) of whom (342,459) males and (179,564) females, and the number of buildings, (79,549) buildings, and the number of residential units (92,302), the number of households (73,342) Family.

__2004 :__ On 16th March this year, a third total census of buildings, housing units, households and establishments were been conducted as the total population at that time was (744,029) of whom (496,382) are males, (247,647) females, the number of buildings was (99,217) buildings, the number of the residential units was (126,203), and the number of the households was (102,184).