Schleswig is a city located in Crawford County Iowa. With a 2020 population of 823, it is the 327th largest city in Iowa and the 11157th largest city in the United States . Schleswig is currently declining at a rate of -2.02% annually and its population has decreased by -6.69% since the most recent census, which recorded a population of 882 in 2010. Schleswig reached it's highest population of in . Spanning over 1 miles, Schleswig has a population density of 634 people per square mile.
The average household income in Schleswig is $69,733 with a poverty rate of 14.12%. The median rental costs in recent years comes to $445 per month, and the median house value is $81,700. The median age in Schleswig is 43.8 years, 41 years for males, and 45.7 years for females.