It is a health determinant that is not sufficiently recognized: urban planning plays a crucial role in the quality of life, well-being, and thus the overall health of every individual. Four experts in health-promoting urban planning coordinated this special issue: Anne Roué Le Gall, Mathilde Pascal, Nina Lemaire, and Thierno Diallo. This issue presents a synthesis of knowledge and spotlights on health-promoting urban planning practices in France and abroad. Some twenty researchers and field professionals contributed to it. It includes a contribution from the World Health Organization (WHO), which highlights an urgent need—poor urban planning kills—and puts forward proposals.