Sonnette is an unincorporated community in west central Powder River County, Montana, United States. The community is situated near the headwaters of Pumpkin Creek, just west of the Custer National Forest. It lies along local roads northwest of the town of Broadus, the county seat of Powder River County. Its elevation is 3,766 feet (1,148 m).
There is a community who live along local roads northwest of the town of Broadus in along local roads northwest of the town of Broadus. This Montana community, is not governed by a local municipal corporation and it is situated near the headwaters of Pumpkin Creek, just west of the Custer National Forest.