Dillon is a city located in Montana. With a 2020 population of 4,249, it is the 21st largest city in Montana and the 5231st largest city in the United States. Dillon is currently declining at a rate of -0.14% annually but its population has increased by 2.78% since the most recent census, which recorded a population of 4,134 in 2010. Dillon reached it's highest population of 4,548 in 1970. Spanning over 2 miles, Dillon has a population density of 2,395 people per square mile.
The average household income in Dillon is $50,706 with a poverty rate of 23.52%. The median rental costs in recent years comes to $640 per month, and the median house value is $158,600. The median age in Dillon is 32.3 years, 31.9 years for males, and 33.2 years for females. For every 100 females there are 100.9 males.