The city of Russellville is county seat in northeastern Franklin County, Alabama. As of 2010 census, the total population of Russellville was 9,830 with approximately 3,556 households. Population density was measured 677.9 per square mile. The Watermelon Festival is a local festivity that happen every August in downtown Russellville. The event is held by the chamber of commerce to promote tourism in the city. Russellville Zip codes are 35653-35654.