This article calls for a specific form of comparative inquiry within historical archaeology as drawn from diaspora studies. Such a project encourages archaeologists to compare research from emigrant areas alongside work at overseas sites. This diasporic approach provides new potentials for engaging with the modern world by intersecting with both traditional and new aspects of archaeological practice. In order to showcase these aspects of a diasporic approach, the author explores three case studies from Montana, Peru, and New Zealand – connecting each to its related home area. The case studies explore how data drawn from a group’s homeland can support established heritage practices, engage with modern social problems, and illuminate complexities arising within sites based on ethnolinguistic differences within populations.