To determine characteristics of fish fauna and fish communities in Hoengseong Podong Wetland, six sites were selected and a survey was conducted three times from April 2023 to October 2023. Fish were collected using kick net, cast net, and longbagstow net in rivers or using a kicknet, cast net, triple-gill nets, and triangular net in lakes. As a result of the survey, 5,616 individuals of 33 species in 12 families in 5 orders were collected from six locations. The most dominant species was Pseudorasbora parva (29.5%), followed by Zacco platypus (24.1%), Z. koreanus (10.3%), Hypomesus nipponensis (8.3%), Carassius auratus (5.7%), Pungtungia herzi (4.0%), Squalidus gracilis majimae (3.7%), and C. cuvieri (2.8%). Endangered species identified included Level II Rhodeus pseudosericeus and Gobiobotia brevibarba. Twelve Korean endemic species (an endemicity rate of 36.4%) were also collected: R. pseudosericeus, Coreoleuciscus splendidus, S. gracilis majimae, G. brevibarba, Microphysogobio yaluensis, Z. koreanus, Iksookimia koreensis, Koreocobitis rotundicaudata, Pseudobagrus koreanus, Liobagrus andersoni, Coreoperca herzi, and Odontobutis interrupta. This study also noted the presence of Anguilla japonica (catadromous fish), a migratory species, and two land-lacked species (H. nipponensis and Rhinogobius brunneus). Three species of alien fish, Cyprinus carpio (nudus type), C. cuvieri and Micropterus salmoides were also collected. Among them, M. salmoides was an invasive alien species. The Hoengseong Podong Wetland is a transition zone between the river ecosystem and the lake ecosystem, so it was judged to be a place of high preservation value as many species, including endangered species Rhodeus pseudosericeus and Gobiobotia brevibarba.. However, river construction, dams, and the presence of invasive alien species were identified as disruptive factors. Thus, comprehensive conservation measures are required.