 The evaluation of public health interventions, PHIS, is essential for their success, yet little attention has been given to how processes during evaluation can promote intersectoral collaboration. Our research suggests that early engagement of non-health sectors in the evaluation process, as well as including non-health benefits, can help foster intersectoral collaboration. Additionally, harmonizing methodologies and conducting HIAs can also contribute to intersectoral collaboration. Finally, establishing a dedicated body for evaluating PHIS can also help promote intersectoral collaboration. This article was authored by Sabrina Kriegner, Trig of Ottersen, John Arnrottingen, and others.