A V E R Y  -  C A R T E R  -  J O H N S O N CARTER COUNTY, TENNESSEE Photograph by Hugh Morton Enter here to view more scenes of beautiful Carter County Mountain Electric Cooperative, Inc. serves the Roan Mountain area of Carter County. It is a rural area located west of Elizabethton, Tennessee. There are beautiful valleys surrounded by rolling hills and mountain ranges. Some of the prominent points of interest are Roan Mountain State Park and the Roan Mountain Rhododendron Gardens. Carter County has 341 square miles. The area has an average rainfall of 54 inches, and average temperatures of 76° F in July and 41° F in January. CARTER COUNTY STATISTICS For more information, please call 423-727-1800 or visit State of Tennessee Datasheets