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GEO_TZ1991 (V101_TZ1991)
Tanzania regions, 1991 [GIS]

Codes and Frequencies

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GEO_TZ1991 (V101_TZ1991) indicates the region of Tanzania where the respondent was interviewed. DHS regions in the 1991 Tanzania survey are equivalent to zones.

Other sample years have their own sample-specific geography variables. There are also integrated variables GEO_TZ1991_2015 and GEO_TZ1996_2015, that provide spatially consistent units over time. The 1991 Tanzania sample is excluded from GEO_ TZ1996_2015 due to inconsistent boundaries. Greater geographic detail for the Tanzania 1991 sample can be found in GEOALT_TZ1991.

A GIS map for GEO_TZ1991 (in shapefile format) can be downloaded from the DHS Program Spatial Data Repository Boundaries page.


GEO_TZ1991 (V101_TZ1991) is a country- and sample-specific variable and has no comparability issues.

Comparability - Standard DHS

GEO_TZ1991, like other V101 variables, is a geographic variable added during processing of the DHS data. V101 is included in all Phases of the DHS.


  • Tanzania 1991: All women age 15-49.
  • Tanzania: 1991-B, 1991-M, 1991-H, 1991-W, 1991-C