Atriplex gmelinii C. A. Mey. Ex Bong._1838 is an annual halophytic herb found in East Asia and North America. The chloroplast genome of A. gmelinii was successfully sequenced. The assembled genome (151,852 bp; GC ratio, 37.3\%) is composed of four subregions, with the large single copy (LSC; 83,872 bp; 35.4\%) and small single copy (SSC; 17,812 bp; 30.9\%) regions separated by two regions of inverted repeat regions (25,084 bp; 42.8\%). A total of 130 genes were predicted with 85 protein-coding genes, 8 rRNAs, and 37 tRNAs. The phylogenetic analyses inferred from whole chloroplast genomes of 35 species, including 34 species in Amaranthaceae and one outgroup species, suggest a close relationship between A. gmelinii and A. centralasiatica.