A Gram-negative obligate alkaliphilic bacterium (BOG6T) that secretes carotenoids was isolated fromthe outflow of Lake Bogoria hot spring located in the Kenyan Rift Valley. The bacterium is motile bymeans of a polar flagellum, and forms red colonies due to the production of xanthophyll carotenoidpigments. 16S rRNA gene sequence analysis showed this strain to cluster phylogenetically within thegenus Paracoccus. Strain BOG6T is aerobic, positive for both catalase and oxidase, and nonmethylotrophic.The major fatty acid of the isolate is C18: 1w7c. It accumulated polyhydroxybutyrategranules. Strain BOG6T gave astaxanthin yield of 0.4 mg/g of wet cells indicating a potential forapplication in commercial production of carotenoids. On the basis of its genotypic characteristics, fattyacid composition and physiological reaction profiles, it is proposed that the isolate may be assigned tothe genus Paracoccus as Paracoccus bogoriensis sp. nov. The type strain is BOG6T (=DSM16578=LMG22798). The GenBank 16S rDNA nucleotide sequence accession number is AJ580352.