Indigenous people are distinct groups where a larger population grown up around their original place exerts political dominion over the original people. Statistical measures formulated as data are foundational to public decision making. In this journal issue on Indigenous identity, historic and contemporary circumstances reveal how measurement and lived experience translates into data. Examples represent global Indigenous diversity. Key themes examined are 1) operational definitions 2) why selecting what to measure and how to measure is relevant to Indigenous meaning as well as to serve with reasonable utility as subgroup data 3) invisibility as a common problem for Indigenous people consequent to insufficient measurement methods and political inaction 4) how to understand data comparison and 5) the ways in which political recognition and rights are embedded in measurement strategy. Identity rooted in a place shaped Indigenous culture just as evolutionary biology shaped Indigenous people's physical traits. Accordingly, Indigenous identity involves land claims, jurisdictional reach, and restitution. Agreements and tensions affect individuals. Therefore, Indigenous identity is individual and collective. Some governments recognize Indigenous communities with different legal instruments and engage Indigenous in varying degrees with a government to government approach. Other governments impose definitions and data frameworks from the state on to its Indigenous population. The UN Declaration supports Indigenous people self-determination across a range of domains but most particularly about inclusion and exclusion criteria for belonging to a group. There are different ways inclusion or membership is assessed by an Indigenous group, however, all use some measure to ascertain ancestry. Unique to this collection of papers, is the predominance of people who belong to Indigenous communities and those who have worked within our communities over time which we propose is the best step to achieve useful Indigenous data.