Culbertson was created in June 1887 following the arrival of the Great Northern Railway, then known as the St. Paul, Minneapolis & Manitoba Railway. The town was named after Major Alexander Culbertson, former head of the American Fur Company's Fort Union to the east. The settlement of Culbertson followed hard on the heels of the 1886-87 watershed years for the early cattle industry. As a result, the first settlers in the area raised horses for the US Cavalry’s various Montana and Dakota posts. As cattle prices slowly rebounded, the range was once again stocked with cattle, though the second wave of cattlemen utilized hardy English breeds instead of the Texas longhorns of the earlier outfits. With the passage of new homestead laws in 1909 enabling homesteaders to take out larger acreages, the area saw an influx of dryland farmers. With its railroad connection, Culbertson became the center of the area’s agricultural trade. When the agricultural boom went bust after World War II and never resumed its former glory, Culbertson saw a gradual decline in businesses and population. This was somewhat ameliorated by a heavy railroad presence in the community. Culbertson also became a surviving center as smaller adjacent communities dried up in the agricultural depression of the 1920s and 1930s. With better automobiles and better roads, farmers and ranchers could live further from centers of trade.
As of the census of 2010, there were 714 people, 296 households, and 191 families residing in the town. The population density was. There were 336 housing units at an average density of. The racial makeup of the town was 88.9% White, 0.3% African American, 6.3% Native American, 0.1% Asian, 1.0% from other races, and 3.4% from two or more races. Hispanic or Latino of any race were 1.7% of the population. There were 296 households, of which 29.4% had children under the age of 18 living with them, 56.1% were married couples living together, 5.4% had a female householder with no husband present, 3.0% had a male householder with no wife present, and 35.5% were non-families. 30.7% of all households were made up of individuals, and 14.2% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.93. The median age in the town was 43 years. 23.2% of residents were under the age of 18; 5.5% were between the ages of 18 and 24; 23.7% were from 25 to 44; 29% were from 45 to 64; and 18.6% were 65 years of age or older. The gender makeup of the town was 51.1% male and 48.9% female.
2000 census
As of the census of 2000, there were 716 people, 295 households, and 192 families residing in the town. The population density was 1,213.7 people per square mile. There were 356 housing units at an average density of 603.5 per square mile. The racial makeup of the town was 89.53% White, 0.28% African American, 6.01% Native American, 0.28% Asian, 0.84% from other races, and 3.07% from two or more races. Hispanic or Latino of any race were 0.98% of the population. There were 295 households, out of which 32.5% had children under the age of 18 living with them, 55.6% were married couples living together, 6.4% had a female householder with no husband present, and 34.6% were non-families. 30.8% of all households were made up of individuals, and 15.6% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.90. In the town, the population was spread out, with 23.7% under the age of 18, 5.4% from 18 to 24, 23.7% from 25 to 44, 24.0% from 45 to 64, and 23.0% who were 65 years of age or older. The median age was 43 years. For every 100 females, there were 89.9 males. For every 100 females age 18 and over, there were 90.9 males. The median income for a household in the town was $30,000, and the median income for a family was $38,750. Males had a median income of $26,771 versus $14,643 for females. The per capita income for the town was $15,393. About 11.2% of families and 11.3% of the population were below the poverty line, including 8.6% of those under age 18 and 14.9% of those age 65 or over.
Notable residents
Lane Chandler, western film actor, lived here as a child
