Promoting Healthy Behaviors (PHB) is a social and behavior change (SBC) project (2018 – 2023) funded by the United States Agency for International Development (USAID) and implemented by Population Services International (PSI) to assist the Royal Government of Cambodia in improving healthy behaviors among the Cambodian population. The program has two main objectives: (1) Strengthened public sector systems for oversight and coordination of SBC at the national and provincial levels; and (2) Improved ability of individuals to adopt healthy behaviors, by carrying out a series of behavior change and communication activities in six health areas: Family Planning, Maternal and Child Health, Nutrition, Water Sanitation and Hygiene (WASH), Tuberculosis (TB) and Malaria. The interventions focus on target populations living in Phnom Penh municipality, Battambang, Pailin, Kampong Chhnang, Kampong Cham and Tbong Khmum provinces. The baseline survey aims to assess current knowledge, attitude, and practices of target population on the key behaviors across five health areas (excluding malaria) and to document the starting level of key indicators to assess project performance through comparison with an end line survey. Moreover, the collected information will help to understand health behaviors amongst the target populations, useful for the co-diagnosis and co-design stage of the SBC activities. Promoting Healthy Behaviors (PHB) is a social and behavior change (SBC) project (2018 – 2023) funded by the United States Agency for International Development (USAID) and implemented by Population Services International (PSI) to assist the Royal Government of Cambodia in improving healthy behaviors among the Cambodian population. The program has two main objectives: (1) Strengthened public sector systems for oversight and coordination of SBC at the national and provincial levels; and (2) Improved ability of individuals to adopt healthy behaviors, by carrying out a series of behavior change and communication activities in six health areas: Family Planning, Maternal and Child Health, Nutrition, Water Sanitation and Hygiene (WASH), Tuberculosis (TB) and Malaria. The interventions focus on target populations living in Phnom Penh municipality, Battambang, Pailin, Kampong Chhnang, Kampong Cham and Tbong Khmum provinces. The baseline survey aims to assess current knowledge, attitude, and practices of target population on the key behaviors across five health areas (excluding malaria) and to document the starting level of key indicators to assess project performance through comparison with an end line survey. Moreover, the collected information will help to understand health behaviors amongst the target populations, useful for the co-diagnosis and co-design stage of the SBC activities. This dataset is part of baseline survey with focusing children under five information.