This study assesses the reliability of power transformers in the transmission network of Rivers State, Nigeria, focusing on the perspectives of electricity consumers, organizational personnel, and business operators through a descriptive survey. The research involved 390 electricity consumers selected using convenience sampling from the total population of 725,372 consumers in the Port Harcourt Electricity Distribution Company (PEDC). Data was collected using the Consumers Perception of Electricity Power Transformer Reliability (COPEPT) questionnaire and structured interviews, with the questionnaire's reliability confirmed through the test-retest technique. Research questions were addressed using weighted mean scores (WMS), revealing dissatisfaction among consumers due to factors such as transformer age, overall condition, uncontrolled overloading, adverse weather conditions, and inadequate transformer capacity. Recommendations included upgrading or replacing outdated transformers, implementing loading limits, introducing robust earthing systems, and increasing transformer capacity to enhance consumer satisfaction and reliability. The study also highlighted the negative impacts of transformer failures on businesses, households, communication, and national income. Key findings emphasized the need for a comprehensive analysis of power surge control during adverse weather, a plan for upgrading or replacing transformers, an assessment of transformer capacity needs, and collaboration with stakeholders to mitigate economic impacts and improve communication with consumers. The study underscores the importance of power transformer reliability for ensuring a dependable power supply and improving the quality of electricity service in Rivers State.This study assesses the reliability of power transformers in the transmission network of Rivers State, Nigeria, focusing on the perspectives of electricity consumers, organizational personnel, and business operators through a descriptive survey. The research involved 390 electricity consumers selected using convenience sampling from the total population of 725,372 consumers in the Port Harcourt Electricity Distribution Company (PEDC). Data was collected using the Consumers Perception of Electricity Power Transformer Reliability (COPEPT) questionnaire and structured interviews, with the questionnaire's reliability confirmed through the test-retest technique. Research questions were addressed using weighted mean scores (WMS), revealing dissatisfaction among consumers due to factors such as transformer age, overall condition, uncontrolled overloading, adverse weather conditions, and inadequate transformer capacity. Recommendations included upgrading or replacing outdated transformers, implementing loading limits, introducing robust earthing systems, and increasing transformer capacity to enhance consumer satisfaction and reliability. The study also highlighted the negative impacts of transformer failures on businesses, households, communication, and national income. Key findings emphasized the need for a comprehensive analysis of power surge control during adverse weather, a plan for upgrading or replacing transformers, an assessment of transformer capacity needs, and collaboration with stakeholders to mitigate economic impacts and improve communication with consumers. The study underscores the importance of power transformer reliability for ensuring a dependable power supply and improving the quality of electricity service in Rivers State.