The field of Human-Computer Interaction (HCI) both shapes and is shaped by the forces of economic growth. Extending the calls to move beyond the growth imperative in HCI, this workshop aims to bring HCI researchers, designers, and practitioners together in a critical dialogue on examining the often-hidden ways growth patterns manifest in HCI. We ask how the HCI community can use its research, design, and praxis to build a more emancipatory future. The workshop aims to nurture the Post-growth HCI Collective of scholars and practitioners to work together, in solidarity, to reflect and resist the commodification and drive for infinite capital accumulation in/through digital technologies for the betterment of HCI and the broader computing community. Through collective action, we aim to operationalize post-growth principles in HCI, contributing to more tangible pathways toward socio-ecologically just and sustainable technology-mediated futures for the planet and its residents.