Fort Madison is a city located in Lee County Iowa. With a 2020 population of 10,201, it is the 40th largest city in Iowa and the 3060th largest city in the United States . Fort Madison is currently declining at a rate of -0.58% annually and its population has decreased by -7.69% since the most recent census, which recorded a population of 11,051 in 2010. Fort Madison reached it's highest population of in . Spanning over 13 miles, Fort Madison has a population density of 1,055 people per square mile.
The average household income in Fort Madison is $56,680 with a poverty rate of 15.89%. The median rental costs in recent years comes to $709 per month, and the median house value is $81,600. The median age in Fort Madison is 42.5 years, 40 years for males, and 45.2 years for females.