We present a genome assembly from an individual female <i>Leucania comma</i> (the Shoulder-striped Wainscot moth; Arthropoda; Insecta; Lepidoptera; Noctuidae). The genome sequence spans 751.70 megabases. Most of the assembly is scaffolded into 32 chromosomal pseudomolecules, including the Z and W sex chromosomes. The mitochondrial genome has also been assembled and is 15.37 kilobases in length. Gene annotation of this assembly on Ensembl identified 12,477 protein-coding genes.