Vermillion is a city located in Clay County South Dakota. With a 2020 population of 11,254, it is the 11th largest city in South Dakota and the 2864th largest city in the United States . Vermillion is currently growing at a rate of 1.48% annually and its population has increased by 6.46% since the most recent census, which recorded a population of 10,571 in 2010. Vermillion reached it's highest population of 11,254 in 2021. Spanning over 5 miles, Vermillion has a population density of 2,464 people per square mile.
The average household income in Vermillion is $68,559 with a poverty rate of 28.72%. The median rental costs in recent years comes to $740 per month, and the median house value is $159,600. The median age in Vermillion is 23 years, 23.2 years for males, and 22.9 years for females.