Population Estimate, Total, Hispanic or Latino (5-year estimate) in Lyon County, IA was 365.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Hispanic or Latino (5-year estimate) in Lyon County, IA reached a record high of 365.00000 in January of 2022 and a record low of 120.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Hispanic or Latino (5-year estimate) in Lyon County, IA - last updated from the United States Federal Reserve on May of 2024.