Resident Population in La Paz County, AZ was 16.71000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in La Paz County, AZ reached a record high of 21.25700 in January of 2019 and a record low of 8.07000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in La Paz County, AZ - last updated from the United States Federal Reserve on May of 2024.