Transnational communities transcend national borders in order to act collectively, despite geographic, economic, and political challenges. Oaxacan migrants exemplify how community organizations mobilize beyond the local scale to facilitate community-based planning in the United States and Mexico. The article brings together contributions from scholarship on collective action, governance, and citizenship to analyze community-based planning. It analyzes how Oaxacan migrants modify norms and customs about community service and indigenous governance in relation to community-based planning in both countries. The findings expand our understanding of how community-based planning is scaled up and embedded in transnational processes and relationships.