A Gram-stain-negative, rod-shaped, red-coloured and aerobic bacterium, designated 2b14T, was isolated from rhizosphere soil of Saxifraga oppositifolia sampled at the Chinese Arctic Yellow River Station in Norway. Optimal growth occurred at 28?°C (range, 4-37?°C) and pH 7.0-7.5 (pH 6.5-8.5). The strain could tolerate up to 2.5?% (w/v) NaCl concentration. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain 2b14Thad the highest similarity value of 96.0?% to Pontibacter diazotrophicus CCTCC AB 2013049T. The major fatty acids were summed feature 4 (anteiso-C17?:?1 B and/or iso-C17?:?1 I), iso-C15?:?0 and iso-C17?:?0 3-OH. The major polar lipid was found to be phosphatidylethanolamine. The genomic DNA G+C?content of strain 2b14T was 45.5?mol%. The sole respiratory quinone was MK-7. The combined results of physiological, genotypic, phylogenetic and chemotaxonomic analyses showed that strain 2b14T represents a novel species within the genus Pontibacter, for which the name Pontibacter arcticus sp. nov. is proposed. The type strain is 2b14T (=KCTC 62596T=MCCC 1H00304T).