Abstract. This study was aimed to determine the length-weight relationships and Fulton s condition factors of the genus Seminemacheilus that is endemic for Turkey. The specimens were collected from 2017 to 2019 using an electrofishing device (SAMUS 1000MP). The total length and the total weight of the examined specimens ranged from 3.5 to 9.1 cm and from 0.31 to 7.52 g, respectively. Based on the results, the growth coefficient values b ranged from 2.56 (S. ispartensis) to 3.48 (S. attalicus). Also, the condition factor of the studied fishesranged from 0.77 (S. dursunavsari) to 1.11 (S. attalicus). This study represents the first reports of length-weight relationship data for S. ahmeti, S. attalicus, S. dursunav ari, S. ekmekciae, and S. ispartensis from Turkish inland waters and four new maximum total lengths for the Seminemacheilus species. The results of this study provide useful information for further fisheries management, fish population dynamic studies and comparisons in future studies.