Resident Population in Delta County, TX was 5.52000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Delta County, TX reached a record high of 5.52000 in January of 2023 and a record low of 4.75900 in January of 1992. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Delta County, TX - last updated from the United States Federal Reserve on May of 2024.