Deschampsia antarctica É. Desv., the only indigenous grass species in the Antarctic Peninsula and the surrounding islands, has garnered significant garnered significant scientific attention due to its remarkable adaptations to the extreme polar environment. Given the importance of genomic adaptation in plants, particularly in extremophiles like D. antarctica, genome analysis and annotation is crucial for understanding its evolutionary significance and potential adaptive mechanisms. Here, a chromosome-scale assembly is presented for this species. The assembly was generated by Revio HiFi sequencing with proximity ligation Hi-C for the scaffolding and represents 4.755 Gb with 13 pseudochromosomes. The genome assembly statistics presented a contig N50 of 67.2 Mb, a BUSCO (Benchmarking Universal Single-Copy Orthologue) score of 99.1%, collectively signal the achieved high assembly quality. A comprehensive annotation yielded a total of 178,191 genes, and the associated BUSCO score of 98.2% for the annotated sequences attests to their completeness.