Ripley is a city in Lauderdale County, Tennessee, United States. The population was 8,445 at the 2010 census. It is the county seat of Lau…Ripley is a city in Lauderdale County, Tennessee, United States. The population was 8,445 at the 2010 census. It is the county seat of Lauderdale County. Ripley is located at 35°44′35″N 89°32′2″W / 35.74306°N 89.53389°W.