Effingham is a city located in Atchison County Kansas. With a 2020 population of 520, it is the 277th largest city in Kansas and the 13134th largest city in the United States . Effingham is currently declining at a rate of -0.19% annually and its population has decreased by -4.76% 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 840 people per square mile.
The average household income in Effingham is $50,160 with a poverty rate of 6.48%. The median rental costs in recent years comes to $595 per month, and the median house value is $75,300. The median age in Effingham is 45.9 years, 45.4 years for males, and 53.1 years for females.