Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Martin County, TX was 67.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Martin County, TX reached a record high of 246.00000 in January of 2011 and a record low of 28.00000 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, Black or African American Alone (5-year estimate) in Martin County, TX - last updated from the United States Federal Reserve on May of 2024.