Neonatal mortality rates remain high in many low- and middle-income countries, including Tanzania. Community-based maternal health and child-welfare support programmes have shown promise in reducing these rates. Data were collected through community surveys and hospital records. A multivariable logistic regression model was used to analyse outcomes. During the study period, there was a significant reduction in neonatal mortality rates (p < 0.05) among children supported by these programmes compared to those not involved. Community-based maternal health and child-welfare support programmes effectively reduce neonatal mortality in Dar es Salaam, Tanzania. Scaling up these programmes should be considered as a public health strategy to further decrease neonatal mortality rates. Maternal Health, Child Welfare, Neonatal Mortality, Community-Based Programmes, Multivariable Logistic Regression Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.