Sample characteristics: Vietnam
| Census/survey characteristics | |
| Type | Census |
| Title | 1989 Population and Housing Census |
| Statistical agency | Bureau of The Central Steering Committee for the 1989 Population and Housing Census. General Statistics Office. |
| Population universe | Residents in Vietnam, including those usually resident in Vietnam, but who were overseas at the time of the census; special groups were enumerated, including the police force, army and foreign affairs. |
| De jure or de facto | De jure |
| Census/survey day | April 1, 1989 |
| Questionnaire | Two forms: long (5% sample survey) and short (remaining 95% of the population). The long form contained both the core and sample questions. Dwelling questions covered 19 provinces/cities, not necessarily corresponding to the sample survey. |
| Type of fieldwork | Direct enumeration |
| Estimated undercount | No official estimate |
| Microdata sample characteristics | |
| Sample design | Stratified systematic sample of enumeration areas. Strata correspond to 80 geographic areas, according to urban/rural and provinces/cities. All dwellings/households within an enumeration area are included in the sample. |
| Sample fraction | 5% |
| Sample size (person records) | 2626985 |
| Sample weights | Computed by census agency and should be used for most types of analysis |
| Units identified in microdata | |
| Dwellings | Not identified in current microdata version |
| Vacant units | No |
| Households | Yes |
| Collective dwellings | Yes |
| Smallest geography | Province |
| Unit definitions | |
| Dwellings | Undetermined |
| Households | One or more persons who share food and living space. |
| Collective dwellings | Government institutions, factories, and other collective organizations; people living far from their families; unrelated individuals not sharing common budget. |
| Census/survey characteristics | |
| Type | Census |
| Title | 1999 Population and Housing Census |
| Statistical agency | Bureau of The Central Steering Committee for the 1999 Population and Housing Census. General Statistics Office. |
| Population universe | Residents in Vietnam, including those usually resident in Vietnam, but who were overseas at the time of the census; special groups were enumerated, including the police force, army and foreign affairs. |
| De jure or de facto | De jure |
| Census/survey day | April 1, 1999 |
| Field work period | Completed within 7 to 10 days |
| Questionnaire | Two forms: long (3% sample survey) and short (remaining 97% of the population). The long form contained both the core and sample questions. Dwelling questions were included as core questions (100% of population) and, in rural areas, additional household questions on means of production were included on both long and short forms. |
| Type of fieldwork | Direct enumeration |
| Estimated undercount | No official estimate |
| Microdata sample characteristics | |
| Sample design | Stratified systematic sample of enumeration areas. Strata correspond to 122 geographic areas, according to urban/rural and provinces/cities. All dwellings/households within an enumeration area are included in the sample. |
| Sample fraction | 3% |
| Sample size (person records) | 2368167 |
| Sample weights | Computed by census agency and should be used for most types of analysis |
| Units identified in microdata | |
| Dwellings | Yes |
| Vacant units | No |
| Households | Yes |
| Collective dwellings | No |
| Smallest geography | Province |
| Unit definitions | |
| Dwellings | Undetermined |
| Households | Undetermined |
| Collective dwellings | Not identified |
| Census/survey characteristics | |
| Type | Census |
| Title | 2009 Population and Housing Census |
| Statistical agency | Bureau of The Central Steering Committee for the 2009 Population and Housing Census. General Statistics Office. |
| Population universe | Residents in Vietnam, including those usually resident in Vietnam, but who were overseas at the time of the census; special groups were enumerated, including the police force, army and foreign affairs. |
| De jure or de facto | De jure |
| Census/survey day | April 1, 2009 |
| Field work period | Completed within 7 to 14 days |
| Questionnaire | Two forms: long (15% sample survey) and short (remaining 85% of the population). The long form contained both the core and sample questions. |
| Type of fieldwork | Direct enumeration |
| Microdata sample characteristics | |
| Sample design | Stratified systematic sample of enumeration areas. Strata correspond to 3 groups of districts. All dwellings/households within an enumeration area are included in the sample. |
| Sample fraction | 0.15 |
| Sample size (person records) | 14177590 |
| Sample weights | Computed by census agency and should be used for most types of analysis |
| Units identified in microdata | |
| Dwellings | Yes |
| Vacant units | No |
| Households | Yes |
| Collective dwellings | No |
| Smallest geography | District |
| Unit definitions | |
| Dwellings | Undetermined |
| Households | One or more persons who share food and living space. These persons may or may not be related to each other. |
| Collective dwellings | Households living in tent/camp/inn/hotel: or collective house, barrack, campus, etc. or no living house. |
| Census/survey characteristics | |
| Type | Census |
| Title | 2019 General Census on Population and Housing |
| Statistical agency | Central Population and Housing Census Steering Committee. General Statistics Office. |
| Population universe | Residents in Vietnam, including those usually resident in Vietnam, but who were overseas at the time of the census; special groups were enumerated, including the police force, army and foreign affairs. |
| De jure or de facto | De jure |
| Census/survey day | April 1, 2019 |
| Field work period | Conducted in about 25 days (including travel time in the locality), starting from April 1, 2019. |
| Questionnaire | Two forms: long (8.5% sample survey) and short (remaining of the population). The long form contained both the core and sample questions. |
| Type of fieldwork | Direct enumeration |
| Microdata sample characteristics | |
| Sample design | Stratified two-stage sample design. In the first stage, enumeration areas were selected basedon household size. In the second stage, sample households were selected systematically. |
| Sample fraction | 0.085 |
| Sample size (person records) | 8236773 |
| Sample weights | Computed by census agency and should be used for most types of analysis |
| Units identified in microdata | |
| Dwellings | No |
| Vacant units | No |
| Households | Yes |
| Collective dwellings | No |
| Smallest geography | District |
| Unit definitions | |
| Dwellings | - |
| Households | Household includes one person eating and residing separately or a group of people eating and residing together. For households with two or more people, members of the household may or may not have a shared revenue and expenditure fund; whether they are related by blood, marriage or adoption; or a combination of both. |
| Collective dwellings | Households living in tent/camp/inn/hotel: or collective house, barrack, campus, etc. or no living house. |