Effingham is a city located in Kansas. With a 2020 population of 517, it is the 276th largest city in Kansas and the 13158th largest city in the United States. Effingham is currently declining at a rate of -0.39% annually and its population has decreased by -5.31% since the most recent census, which recorded a population of 546 in 2010. Effingham reached it's highest population of 551 in 2010. Spanning over 1 miles, Effingham has a population density of 835 people per square mile.
The average household income in Effingham is $46,169 with a poverty rate of 8.99%. The median rental costs in recent years comes to $600 per month, and the median house value is $79,200. The median age in Effingham is 48.2 years, 48.1 years for males, and 50.3 years for females. For every 100 females there are 88.0 males.