Roberts, WI has a population of 1,641 and is the 12,178th largest city in the United States. The population density is 634 per sq mi which is 487% higher than the Wisconsin average and 600% higher than the national average. The median age in Roberts is 32 which is approximately 18% lower than the Wisconsin average of 39. In Roberts, 67% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 51% of Roberts residents were born in Wisconsin, 45% were born out of state, 0% were born outside of the United States and 4% were foreign born.