Resident Population in Lavaca County, TX was 20.57100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Lavaca County, TX reached a record high of 20.58900 in January of 2022 and a record low of 17.80000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Lavaca County, TX - last updated from the United States Federal Reserve on May of 2024.