Junction City is a city located in Geary County Kansas. It is also the county seat of Geary County. With a 2020 population of 19,952, it is the 21st largest city in Kansas and the 1867th largest city in the United States . Junction City is currently declining at a rate of -3.69% annually and its population has decreased by -14.56% since the most recent census, which recorded a population of 23,353 in 2010. Junction City reached it's highest population of 25,758 in 2012. Spanning over 11 miles, Junction City has a population density of 1,796 people per square mile.
The average household income in Junction City is $61,122 with a poverty rate of 12.22%. The median rental costs in recent years comes to $950 per month, and the median house value is $143,100. The median age in Junction City is 28.1 years, 26.6 years for males, and 29.7 years for females.