Resident Population in Jasper County, IA was 37.91900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Jasper County, IA reached a record high of 37.93800 in January of 2022 and a record low of 34.56700 in January of 1987. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Jasper County, IA - last updated from the United States Federal Reserve on May of 2024.