We present a genome assembly from an individual female Nebria brevicollis (a ground beetle; Arthropoda; Insecta; Coleoptera; Carabidae). The genome sequence is 242 megabases in span. Most of the assembly is scaffolded into 15 chromosomal pseudomolecules, with the X sex chromosome assembled. The mitochondrial genome has also been assembled and is 25.2 kilobases in length. Gene annotation of this assembly on Ensembl identified 11,021 proteincoding genes.