This study aims to determine the magnitude and nature of violence against children aged 8 years and less, and the factors associated with it, in three districts of Tanzania. Violence against children is considered under four categories: physical, sexual, emotional and neglect. Quantitative and qualitative approaches were adopted. The quantitative approach involved probability samples of adults and children aged 8 years or less from households randomly selected from the three districts. The qualitative approach involved in-depth interviews or focus group discussions with community adults and others. A total of 1,980 eligible households were sampled. The study revealed that risk factors for physical, emotional, neglect and sexual violence in children aged under eight include cultural, economic, social and gender dynamics.