Frontenac is a city located in Crawford County Kansas. With a 2020 population of 3,382, it is the 82nd largest city in Kansas and the 5871st largest city in the United States . Frontenac is currently declining at a rate of -0.09% annually and its population has decreased by -1.60% since the most recent census, which recorded a population of 3,437 in 2010. Frontenac reached it's highest population of 3,459 in 2012. Spanning over 5 miles, Frontenac has a population density of 682 people per square mile.
The average household income in Frontenac is $69,535 with a poverty rate of 4.86%. The median rental costs in recent years comes to $804 per month, and the median house value is $131,400. The median age in Frontenac is 36 years, 33.4 years for males, and 39.5 years for females.