In this study, the solar energy potential of 8 cities in the Aegean region was investigated. In addition, the solar energy potential of these 8 cities and the power of PV power plants that produce electricity directly with solar energy in these provinces were compared. Despite the increase in solar energy investments in the Aegean region, which has a high solar energy potential, the installed power per capita is still very low. The annual average temperature of the cities in the region is 14.82 ⁰C, the annual average number of rainy days is 92.5 days, the average daily sunshine duration is 6.97 hours, and the average annual sunshine duration is 2738 hours/year. The average radiation intensity of the Aegean region is 1304 kWh/m²-year. The average installed power of the cities in the region is 185,4 MW. Denizli solar power plant has values above the regional average in terms of installed power, ra diation intensity, annual and daily average sunshine duration and average temperature. In addition, with 91.1 days, it has the number of rainy days below the regional average in the number of annual rainy days. According to the population, the per capita installed power of Denizli is 0.188 kW. The cities with the highest installed power per capita in the Aegean region are Uşak with 0.34 kW and Afyon with 0.33 kW. When all the cities in the region are examined, it is seen that they have not yet reached the sufficient level of installed power according to their solar energy potential. Therefore, solar energy investments in the region should be increased and developed with local practices.