Hillsdale, WY has a population of 141 and is the 25,878th largest city in the United States. The population density is 168 per sq mi which is 2750% higher than the Wyoming average and 85% higher than the national average. The median age in Hillsdale is 0 which is approximately 100% lower than the Wyoming average of 37. In Hillsdale, 0% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 50% of Hillsdale residents were born in Wyoming, 50% were born out of state, 0% were born outside of the United States and 0% were foreign born.