Hillsboro is a city located in Jefferson County Missouri. It is also the county seat of Jefferson County. With a 2020 population of 3,396, it is the 175th largest city in Missouri and the 5853rd largest city in the United States . Hillsboro is currently growing at a rate of 1.56% annually and its population has increased by 20.38% since the most recent census, which recorded a population of 2,821 in 2010. Spanning over 4 miles, Hillsboro has a population density of 884 people per square mile.
The average household income in Hillsboro is $73,329 with a poverty rate of 12.29%. The median rental costs in recent years comes to $835 per month, and the median house value is $153,600. The median age in Hillsboro is 29.4 years, 27.8 years for males, and 32.7 years for females.