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Background: The fall armyworm (FAW), Spodoptera frugiperda(J. E. Smith) (Lepidoptera: Noctuidae), is an aggressive pest species that causes severe economic losses in outbreak regions. Use of FAW natural enemies, particularly native parasitoids, has been suggested as a promising control strategy. Campoletis chlorideaeUchida (Hymenoptera: Ichneumonidae) is a solitary ichneumonid larval endoparasitoid with a broad host range that includes S. frugiperda. However, its parasitism rate, developmental stages, and population dynamics during parasitization of S. frugiperdaremain unclear. A field survey was conducted to determine the emergence rate and sex ratio of C. chlorideae, evaluated the biological control performance, and investigated the production potential of it on the individually reared and group-reared S. frugiperdathrough age-stage, two-sex life tables, respectively. Results: The results showed that C. chlorideaeparasitizing individually reared FAW resulted for the parasitoid in a lifetime total fecundity (F) of 301.5 ± 16.4 eggs/female, a net reproduction rate (R0) of 62.03 ± 9.07 adult females/female, an overall life span of females of 28.3 ± 0.52 days, and an intrinsic rate of increase (r) of 0.1946 ± 0.0076 day−1. In contrast, the parameters of F, R0, overall life span of females, and rwere 87.71 ± 6.32 pupae/female, 6.02 ± 1.61 adult females/female, 25.21 ± 0.79 days, and 0.0918 ± 0.0148 day−1in group-reared S. frugiperda. Conclusions: This study suggests that C. chlorideaehas a promising biological control potential against S. frugiperda. Future research should focus on developing methods to increase the production of C. chlorideae.