Abstract Health promotion programs targeted at distinct health outcomes such as childhood obesity, at local level are increasingly used worldwide. There is a need to better understand the role of local governments (municipalities) as key public health promoters namely in the prevention of obesity in children. This study aims to provide some input regarding this issue in Portugal. In order to achieve this goal, health enhancing programs promoted by Portuguese municipalities in which children could participate were identified. The search of such programs was limited to the municipalities that were part of the Portuguese Network of Healthy Municipalities in 2021 (N = 57). A subsequent document analysis was conducted to describe how municipalities conceptualized children’s health by retrieving information on which topics the programs were focused on, or acted upon, and identify which socio-ecological model levels of health determinants were addressed (or not) by each program. The 77 identified programs were promoted by 30 municipalities and only 11 programs addressed childhood obesity. Most programs focused on the individual health determinants (N = 27) and provided limited information overall, which hindered a more in-depth analysis. The findings suggest that Portuguese municipalities seem to disregard their potential as public health promoters. Childhood obesity is a major public health concern at national level, as reflected in the National Health Plans, but not perceived as such locally. Municipalities are the closest government entities to the population, and it is their responsibility to ensure the population’s quality of life, by addressing the social and environmental determinants of health. Hence, municipalities should instill health concerns in all their actions/interventions, taking in consideration the most recent evidence, specifically in the case of childhood obesity. Key messages • This study findings suggest that, despite childhood obesity being a major public health concern at national level, as reflected in the National Health Plans, it is not perceived as such locally. • There is a need to better understand the role of municipalities as key public health promoters considering they are responsible to intervene on the social and environmental determinants of health.