Hobson is a city in Judith Basin County, Montana, United States. The population was 179 at the 2020 census. As the freight-wagon crossing of the Judith River between Fort Benton and the Musselshell River country, this community was once known as the “Gateway to the Judith Basin.” In 1881 the post office opened under the name Philbrook. In 1908, however, the Great Northern Railway’s Billings and Northern branch line established another town 4 miles west.