An aerobic, Gram-stain-negative, non-motile, non-spore-forming, rod-shaped and pink-colored bacterial strain, designated BRD72(T), was isolated from a crater lake (Baengnokdam) at the top of Mt. Hallasan in the Republic of Korea. Cells were catalase-positive and oxidase-negative. Phylogenetic analysis based on the 16S rRNA gene sequences revealed that the isolate was a member of the genusHymenobacterand most closely related toHymenobacter marinusKJ035(T)(96.2% similarity). The isolate was found to produce carotenoid pigment, but not flexirubin-type pigment. The predominant fatty acids of strain BRD72(T)were summed feature 3 (C-16:1 omega 7cand/or C-16:1 omega 6c, 21.6%), iso-C-15:0(17.9%), anteiso-C-15:0(13.3%) and summed feature 4 (iso-C17:1I and/or anteiso-C17:1B, 11.3%). The major polar lipids were phosphatidylethanolamine, an unidentified amino lipid, and two unidentified aminophospholipids. The main respiratory quinone was menaquinone-7 (MK-7), and the main polyamine was homospermidine. The DNA G+C content was 59.8 mol%. Based on the phylogenetic, physiological, and chemotaxonomic characteristics, strain BRD72(T)represents a novel species, for which the nameHymenobacter baengnokdamensissp. nov. is proposed. The type strain is BRD72(T)(= KCTC 72649(T) = JCM 33837(T)).