The Guiding Principles for City Climate Action Planning reviews typical steps in the city-level climate action planning process in light of a proposed set of globally applicable principles. These principles, shown below, developed through a robust and open multi-stakeholder process, support local officials, planners and stakeholders in climate action planning1. Such plans aim to help cities to reduce greenhouse gas emissions and adopt low emission development trajectories, as well as adapt to the impacts of climate change and build local climate resilience.