This study examines the relationship between electricity infrastructure, environmental considerations, and sustainable tourism development in Livingstone, Zambia, where tourism growth around Victoria Falls continues to increase pressure on energy systems and local environmental management. The purpose of the study is to assess how electricity reliability, solar energy adoption, energy costs, firm size, and facility type influence sustainable tourism performance among tourism enterprises in the area. A mixed-methods research design is adopted in order to generate both statistical and contextual evidence on the role of energy systems in tourism sustainability. The target population comprised 150 tourism-related facilities, including hotels, lodges, guesthouses and tour operators, with stratified random sampling used to ensure representation across sub-sectors. Data were collected through structured questionnaires and key informant interviews. Quantitative data were analyzed using multivariate regression to estimate the effect of electricity reliability, solar energy adoption, energy costs, firm size and facility type on a composite Sustainable Tourism Index (STI), while qualitative data were analyzed thematically. Results show that electricity reliability has a positive and statistically significant effect on sustainability performance (β = 0.152; p = 0.001), while solar energy adoption emerges as the strongest predictor of improved outcomes. Energy costs display a negative relationship with sustainability indicating that higher electricity expenses constrain investment in environmental initiatives. Firm size shows a positive association with sustainability, whereas lodges perform relatively lower than hotels.The study recommend that government and private sector should improve electricity reliability, expand access to affordable renewable energy particularly solar power and support smaller or resource-constrained tourism enterprises aimed at strengthening sustainable tourism development in Livingstone.