Resident Population in McCulloch County, TX was 7.44800 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in McCulloch County, TX reached a record high of 9.19600 in January of 1985 and a record low of 7.44800 in January of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in McCulloch County, TX - last updated from the United States Federal Reserve on April of 2026.