Resident Population in Matagorda County, TX was 36.35900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Matagorda County, TX reached a record high of 40.48300 in January of 1986 and a record low of 27.91300 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Matagorda County, TX - last updated from the United States Federal Reserve on May of 2024.