Milton, Vermont had a population of around 10,714 in 2020. In just one year, that number dropped to 10,685. Many cities in this region have seen a drop in population. People who live outside the city, but work there, are known to increase the population of Montpelier, Vermont, throughout the day. People may be leaving Vermont because more businesses are deciding to operate remotely.
The Burlington-South Burlington, Vermont area is currently home to a population of about 20,292 people. Those were the numbers in 2020 at least. In 2010, the population was at 17,904 which shows a significant growth in this region. Burlington is the most populous city in the state, and you would expect it to grow more exponentially.