Vandalia is a city located in Montgomery County Ohio. With a 2020 population of 14,939, it is the 118th largest city in Ohio and the 2321st largest city in the United States . Vandalia is currently declining at a rate of -0.19% annually and its population has decreased by -2.01% since the most recent census, which recorded a population of 15,246 in 2010. Vandalia reached it's highest population of 15,260 in 2010. Spanning over 12 miles, Vandalia has a population density of 1,210 people per square mile.
The average household income in Vandalia is $76,688 with a poverty rate of 8.05%. The median rental costs in recent years comes to $721 per month, and the median house value is $143,200. The median age in Vandalia is 41 years, 38.7 years for males, and 44.9 years for females.