Onaga is a city located in Kansas. With a 2020 population of 692, it is the 244th largest city in Kansas and the 11942nd largest city in the United States. Onaga is currently growing at a rate of 0.14% annually but its population has decreased by -1.42% since the most recent census, which recorded a population of 702 in 2010. Onaga reached it's highest population of 705 in 2012. Spanning over 1 miles, Onaga has a population density of 1,055 people per square mile.
The average household income in Onaga is $64,428 with a poverty rate of 15.60%. The median rental costs in recent years comes to $579 per month, and the median house value is $67,300. The median age in Onaga is 47.2 years, 38.5 years for males, and 51.7 years for females. For every 100 females there are 88.8 males.