Vienna, MO has a population of 711 and is the 17,370th largest city in the United States. The population density is 666 per sq mi which is 671% higher than the Missouri average and 635% higher than the national average. The median age in Vienna is 41 which is approximately 6% higher than the Missouri average of 38. In Vienna, 58% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 79% of Vienna residents were born in Missouri, 21% were born out of state, 0% were born outside of the United States and 0% were foreign born.