Hillsdale, KS has a population of 258 and is the 23,256th largest city in the United States. The population density is 169 per sq mi which is 382% higher than the Kansas average and 87% higher than the national average. The median age in Hillsdale is 48 which is approximately 31% higher than the Kansas average of 36. In Hillsdale, 45% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 83% of Hillsdale residents were born in Kansas, 17% were born out of state, 0% were born outside of the United States and 0% were foreign born.