Percent of Population Below the Poverty Level (5-year estimate) in Marion County, IA was 7.70% in January of 2022, according to the United States Federal Reserve. Historically, Percent of Population Below the Poverty Level (5-year estimate) in Marion County, IA reached a record high of 9.90 in January of 2015 and a record low of 7.30 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Percent of Population Below the Poverty Level (5-year estimate) in Marion County, IA - last updated from the United States Federal Reserve on May of 2024.