Resident Population in Santa Cruz County, AZ was 49.15800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Santa Cruz County, AZ reached a record high of 49.15800 in January of 2023 and a record low of 13.96600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Santa Cruz County, AZ - last updated from the United States Federal Reserve on May of 2024.