Peribacillus　sp.　R9–11,　isolated　from　a　marine　sediment　sample　of　the　Arctic　Ocean,　can　grow　in　mineral　medium　with　polystyrene　(PS)　plastic　as　sole　carbon　source.　Here,　we　present　the　complete　genome　of　Peribacillus　sp.　R9–11,　which　will　facilitate　the　genome　mining　of　PS　degrading　enzymes.　The　total　length　of　the　sequenced　genome　consists　of　6,288,471　bases,　with　mean　G　+　C　content　of　37.93%.　A　total　of　6447　coding　genes　including　84　tRNAs　and　37　rRNAs　were　predicted　in　the　genome.　Some　potential　PS　degrading　enzymes　including　cytochrome　P450s　and　peroxidases　were　found　in　this　genome.　©　2023　Elsevier　B.V.