This article examines different ontologies of land in settler colonialism and Indigenous movements for decolonization and environmental justice. Settler ontologies of land operate by occluding other modes of perceiving, representing, and experiencing land. Indigenous ontologies of land are commonly oriented around relationality and reciprocal obligations among humans and the other-than-human. Drawing together scholarship from literatures in political economy, political ecology, Indigenous studies, and post-humanism, we synthesize an approach to thinking with land to understand structures of dispossession and the possibilities for Indigenous revitalization through ontological hybridity. Using two different case studies—plantation development in Indonesia and land revitalization in the Confederated Salish & Kootenai Nation—we further develop how settler and Indigenous ontologies operate on the ground, illuminating the coexistence of multiple ontologies of land. Given the centrality of land in settler colonialism, hybrid ontologies are important to Indigenous movements seeking to simultaneously strengthen sovereignty over territory and revitalize land-based practices.