Dubois, IN has a population of 314 and is the 22,249th largest city in the United States. The population density is 200 per sq mi which is 11% higher than the Indiana average and 120% higher than the national average. The median age in Dubois is 29 which is approximately 24% lower than the Indiana average of 37. In Dubois, 57% of the population over 15 years of age are married, 91% speak English and 7% speak Spanish. 96% of Dubois residents were born in Indiana, 4% were born out of state, 0% were born outside of the United States and 0% were foreign born.