 According to the census of 2000, the largest ancestry groups in Chickasaw County were English 44.1%, African 41% and Scots-Irish 13.5%.There were 7,253 households out of which 36.30% had children under the age of 18 living with them, 50.80% were married couples living together, 18.00% had a female householder with no husband present, and 27.10% were non-families.24.90% of all households were made up of individuals and 11.90% had someone living alone who was 65 years of age or older.