Chapter 2 tells the story of how ethnicity came to be known in Kenya through territory, providing an overview of the history of ethnic territorial boundary drawing from its inception with the first colonial administration, to today. The principal motivation for the earliest hard boundaries between purportedly homogenous ethnic groups was to free up land for white settlement and capital accumulation. After independence, the administrative boundaries of provinces and districts were deliberately retained, and ethnic patterns of land settlement were engineered. With multi-party elections in the 1990s, these established ‘ethnic territories’ motivated electoral gerrymandering, the most significant postcolonial driver of ethnic territorialisation. All these practices cemented a profound connection between land, boundaries, identity, rights, power, and security. I show how the 2010 constitution worked within this paradigm, too, but in novel ways that moved toward vagueness to manage the inflammatory, grievance-based politics tethered to boundary drawing in Kenya. In doing so, I show how ethnic territorial population concentration today is less certain than commonly imagined.