Dyer County, TN is located in northwest Tennessee near Hornbeak and Newbern. It was formed from parts of Lauderdale & Obion counties in 1823 with an estimated population around 38,400 people today. Dyer County boasts many attractions for those looking for outdoor fun such as boating on Kentucky Lake or exploring one its caves like Arrowhead Cave; plus multiple historical sites including The Pillow Bird Mound (circa 400 AD) that allows visitors to catch a glimpse into the county’s rich history.