Seneca is a city located in Kansas. With a 2020 population of 2,066, it is the 114th largest city in Kansas and the 7482nd largest city in the United States. Seneca is currently growing at a rate of 0.34% annually and its population has increased by 3.77% since the most recent census, which recorded a population of 1,991 in 2010. Spanning over 2 miles, Seneca has a population density of 1,250 people per square mile.
The average household income in Seneca is $62,052 with a poverty rate of 8.19%. The median rental costs in recent years comes to $493 per month, and the median house value is $138,600. The median age in Seneca is 48.4 years, 45.2 years for males, and 54.5 years for females. For every 100 females there are 94.5 males.