Solar energy as a means of power generation is yet to be fully utilized in Nigeria even if there is abundance of it all over the country. This work investigated the availability and utilization of solar energy resources in some selected geopolitical zones of the country. These include the north-west (Gumel), North-East (Maiduguri, Kumagunnam, Gamboru and Baga), North-Central (Pankshin and Biu), South-West (Lagos), South East (Ihiala) and South-South (Buguma). The annual solar radiation potentials from January-December 2021 as well as the air temperatures were determined for the seven locations under study. Retscreen-a renewable energy software was used for the simulation and analysis. The investigation revealed the annual electricity that can be generated for these Gumel located in North-West had 338,463MWh, while Maiduguri, Kumagunnam, Gamboru and Baga all located in North-East had 158,445MWh, 343,964MWh, 300,927MWh and 317,968MWh respectively. North-Central were Pankshin and Biu are located recorded 149,665MWh and 318,416MWh. South-West, South-East and South-South recorded 128,349MWh, 252,174MWh and 230,209MWh. The investigation has also revealed that of all the seven geographical locations under study, the North-Eastern part of the country is more favourable in terms of value obtained and the least favourable is South-West. The work has further shown that the abundance of electricity in these regions if fully tapped can be a huge source of income to even the neighbouring state or country.