Studies on the population size and fluctuations of noctuid moths (Lepidoptera) at Aswan governorate were undertaken by the use of a light trap throughout two successive years from August 2019 up to July 2021. Results obtained revealed 31 noctuid species within 16 genera. Catches of the noctuids showed significant variations in the number of moths in the two years. Large numbers were trapped during May up to September in the first year and during April up to October in the second one. The peak was during May in both years. The winter months demonstrated the lowest numbers of trapped moths. The species Spodoptera frugiperda (Smith), Noctua pronoba L. and Spodoptera littoralis (Boisduval) were the most abundant species with a total annual number of 1225, 1209, 1182 moths in the first year and 2304, 1433, 1747 moths in the second one, respectively.The species, Agrotis trux, Sesamia wiltshire and Trichoplusia daubei were the least abundant species.