Macrhybopsis tetranema
and
Oncorhynchus gilae
are fish species endemic to the Southwestern United States. We present the complete mitochondrial genomes for these species. Each genome consisted of 13 protein-coding genes, two ribosomal (rRNA) genes, 22 transfer RNA (tRNA) genes, and the control region (D-loop). Mitogenome lengths were 16,916 base pairs (bp) for
M. tetranema
, and 16,976 bp for
O. gilae.
The GC content was 41% for
M. tetranema
and 46% for
O. gilae
. The relationships of
M. tetranema
and
O. gilae
were consistent with previous phylogenetic analyses.