| Census Characteristics | 1971 | 1981 | 1991 | 2001 |
| Title | National Population Housing Census 1971 | National Population Housing Census 1981 | National Population Housing Census 1991 | National Population Housing Census 2001 |
| Census Agency | National Statistical Service of Greece | National Statistical Service of Greece | National Statistical Service of Greece | National Statistical Service of Greece |
| Population | The entire population of the country, including all households and dwellings. | The entire population of the country, including all households and dwellings. | The entire population of the country, including all households and dwellings. | The entire population of the country, including all households and dwellings. |
| Universe | 25% | 10% | 100% | 100% |
| De jure or de facto | De facto | De facto | De facto | De facto |
| Enumeration unit | Dwelling | Dwelling | Dwelling | Dwelling |
| Census day | 14 April 1971 | 5 April 1981 | 17 March 1991 | 18 March 2001 |
| Field work period | Mapping stage begins three to four months before the Census day. All the households are interviewed during the Census day | Mapping stage begins three to four months before the Census day. All the Households are interviewed during the Census day | Mapping stage begins three to four months before the Census day. All the households are interviewed during the Census day | Mapping stage begins three to four months before the Census day. All the households are interviewed during the Census day |
| Enumeration forms used | P1 for private households | P1 for private households | P1 for private households | P1 for private households |
| Type of field work | Direct Enumeration | Direct Enumeration | Direct Enumeration | Direct Enumeration |
| Respondent | Householder | Householder | Householder | Householder |
| Coverage | 100% | 100% | 100% | 100% |
| Microdata sample characteristics | 1971 | 1981 | 1991 | 2001 |
| Sample microdata source | National Statistical Service of Greece | National Statistical Service of Greece | National Statistical Service of Greece | National Statistical Service of Greece |
| Sample design | Systematic Sampling (random start 1 every 2.5 private households from the proceessed 25% households) | All the proccessed data (10% of the total) | Systematic Sampling (random start 1 every 10 private households) | Systematic Sampling (random start 1 every 10 private households) |
| Sample unit | Households | Households | Households | Households |
| Sample fraction | 10% | 10% | 10% | 10% |
| Sample fraction (private households) | - | - | - | - |
| Sample fraction (institutional households) | - | - | - | - |
| Sample size (person records) | 845.473 | 923.108 | 969.407 | 1.028.899 |
| Sample size (private households) | - | - | - | - |
| Sample size (institutional households) | - | - | - | - |
| Sample weights | Self weighting (expansion factor=10) | Self weight (expansion factor=10) | Self weighting (expansion factor=10) | Self weighting (expansion factor=10) |
| Units identified | 1971 | 1981 | 1991 | 2001 |
| Dwellings | Yes | Yes | Yes | Yes |
| Vacant units | No | No | No | No |
| Households | Yes | Yes | Yes | Yes |
| Individuals | Yes | Yes | Yes | Yes |
| Group quarters | No | No | No | No |
| Settled/unsettled Population | Yes | Yes | Yes | Yes |
| Special populations | - | - | No | No |
| Unit definitions | 1971 | 1981 | 1991 | 2001 |
| Dwellings | Separated space with independent access that serves as a human lodging | Separated space with independent access that serves as a human lodging | Separated space with independent access that serves as a human lodging | Separated space with independent access that serves as a human lodging |
| Households | Individuals living in the same dwelling and sharing at least one meal. | Individuals living in the same dwelling and sharing at least one meal. | Individuals living in the same dwelling and sharing at least one meal. | Individuals living in the same dwelling and sharing at least one meal. |
| Institutional population | - | - | - | - |
| Group quarters | Group of persons who share a common roof and food because of work, health, religion, etc. | Group of persons who share a common roof and food because of work, health, religion, etc. | Group of persons who share a common roof and food because of work, health, religion, etc. | Group of persons who share a common roof and food because of work, health, religion, etc. |
| Unsettled population | - | - | - | - |
in collaboration with Minnesota Population Center 
