Bombus fraternus is a species of bumblebee known commonly as the Southern Plains bumblebee. It is native to the United States east of the Rocky Mountains. It is most often encountered in the Southeast, in areas with sandy soil. They range from New Jersey to Florida, North Dakota, South Dakota, Nebraska, Colorado, and New Mexico. It is uncommon today, having faced declines in population; its estimated abundance is less than 15% of historical numbers.