Tanzania's Social Insitutions and Gender Index (SIGI Tanzania) is a composite index measuring discriminatory social institutions at the national and subnational levels. The conceptual framework of the SIGI Tanzania covers four dimensions spanning major socio-economic areas that affect women’s and girls’ entire lifetimes: discrimination in the family, restricted physical integrity, restricted access to productive and financial resources, and restricted civil liberties builds. Each dimension builds on three to five indicators. Each indicator results from the aggregation of several variables measuring the level of discrimination in attitudes and in practice. In total, the SIGI Tanzania builds on 68 variable that draw directly on the data of the SIGI Tanzania household survey and that are available in the GID Tanzania dataset. The SIGI Tanzania, its dimensions and its indicators range from 0 to 100, with 0 indicating no discrimination and 100 indicating absolute discrimination against women. Covering the 31 regions of the country, the SIGI Tanzania seeks to provide an in-depth look at how attitudes and practices create gaps between women and men in terms of opportunities and outcomes, with particular attention to women’s economic empowerment, intra-household dynamics and women’s physical autonomy.