Bombus crotchii is a species of bumblebee known by the common name Crotch bumblebee. It is native to California in the United States and Baja California in Mexico and has also been reported from Nevada. This bee lives in grassland and scrub habitat types. It nests underground. Its food plants include milkweeds, dustymaidens, lupines, medics, phacelias, and sages. This bee tolerates hotter and drier habitat types than do most bumblebees.