Vienna, IL has a population of 1,431 and is the 12,968th largest city in the United States. The population density is 504 per sq mi which is 127% higher than the Illinois average and 457% higher than the national average. The median age in Vienna is 44 which is approximately 17% higher than the Illinois average of 37. In Vienna, 53% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 68% of Vienna residents were born in Illinois, 29% were born out of state, 2% were born outside of the United States and 1% were foreign born.