This chapter examines the enumeration of ethnic populations in the census, where ‘the tribe question’ has been included since 1948. I trace its evolution – from its origins as self-evidently important with a self-evident list of groups – through numerous changes up to 2019. The powerful social imaginary of ‘42+ tribes’ comes from the 1969 census, despite the numerous changes since then. I show how changes in classifications over time, as well as the way they have been used and narrated by the state, reveal the multiple political purposes of classifying and counting ethnicity. In the colonial period, this centred on ethnic population distribution to support indirect rule via ethnicity, as well as tax collection and labour control. In the postcolonial period, ethnic demographic posturing for electoral purposes or ‘the tyranny of numbers’ became a major driver of interest in ‘the tribe question’. However, since 2009, the census has also been a site of recognition for minorities and of the painting of a portrait of a nation defined by its diversity. In this chapter, I also show how the quintessentially unambiguous nature of ethnic census codes has been rendered ambiguous in useful ways.