Mount Pulaski, IL has a population of 1,444 and is the 12,915th largest city in the United States. The population density is 1,276 per sq mi which is 474% higher than the Illinois average and 1308% higher than the national average. The median age in Mount Pulaski is 46 which is approximately 23% higher than the Illinois average of 37. In Mount Pulaski, 72% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 88% of Mount Pulaski residents were born in Illinois, 11% were born out of state, 0% were born outside of the United States and 1% were foreign born.