Power losses in long-distance transmission remain a majorchallenge for efficient electricity delivery, especially indeveloping countries like Nigeria. These losses, caused bytechnical inefficiencies and outdated infrastructure, result inhigh operational costs, reduced utility revenue, and limitedenergy access. This study explores advanced transmissiontechniques—such as High Voltage Direct Current (HVDC),Flexible AC Transmission Systems (FACTS), HighTemperature Low-Sag (HTLS) conductors, and DynamicLine Rating (DLR)—to reduce losses and improve gridreliability. Focusing on the Nigerian power system, theresearch highlights the economic, social, and environmentalimpacts of transmission inefficiencies. It demonstrates thatadopting modern technologies, coupled with policy reformand strategic investment, can significantly reduce losses,enhance grid performance, and support nationaldevelopment goals