Wibaux ( WEE-boh) is a town in and the county seat of Wibaux County, Montana, United States. The population was 589 at the 2010 census.
As of the census of 2010, there were 589 people, 278 households, and 153 families residing in the town. The population density was 545.4 inhabitants per square mile (210.6/km2). There were 308 housing units at an average density of 285.2 per square mile (110.1/km2). The racial makeup of the town was 96.4% White, 0.5% Native American, 0.7% Asian, 0.5% from other races, and 1.9% from two or more races. Hispanic or Latino of any race were 1.7% of the population.
There were 278 households of which 23.4% had children under the age of 18 living with them, 41.4% were married couples living together, 7.2% had a female householder with no husband present, 6.5% had a male householder with no wife present, and 45.0% were non-families. 42.4% of all households were made up of individuals and 17.3% had someone living alone who was 65 years of age or older. The average household size was 2.03 and the average family size was 2.76.
The median age in the town was 50.4 years.