Endophytic fungi inhabit healthy plant tissues without causing apparent disease symptoms and contribute to host fitness through diverse ecological functions. In this study, two endophytic fungal isolates obtained from asymptomatic leaves of Stephanandra incisa and Celtis sinensis in Korea were identified based on their morphological characteristics and multilocus phylogenetic analyses. The isolates were confirmed to be Microascus brunneosporus and Colletotrichum camelliae-japonicae, which are unrecorded fungal species in Korea. Their cultural, morphological, and phylogenetic characteristics are described. These findings expand our understanding of the endophytic fungal diversity in Korea.