The culturomics method enabled isolation of a new member of the Ottowia genus from the stool sample of a healthy volunteer. Strain Marseille-P4747T exhibited a 96.18% 16S rRNA sequence identity with Ottowia beijingensis strain GCS-AN-3 (NR_133803.1), the closest species with standing in nomenclature. It is a Gram-stain-negative, nonmotile, and aerobic bacterium. It does not possess catalase and oxidase activities. Its genome has a size of 2 830 447 bp and a G + C content of 63.5 mol%. Based on the phylogenic, phenotypic, and genomic analyses, we conclude that Ottowia massiliensis sp. nov. is a new species, represented by Marseille-P4747T ( = CSUR P4747 = CECT 30348) as type strain.