US 19 hits 9/9 county seats along its route in West Virginia: Princeton (Mercer County), Beckley (Raleigh County), Fayetteville (Fayette County), Summersville (Nicholas County), Sutton (Braxton County), Weston (Lewis County), Clarksburg (Harrison County), Fairmont (Marion County), and Morgantown (Monongalia County).
WV 16 hits 9/10: Welch (McDowell County), Pineville (Wyoming County), Beckley (Raleigh County), Fayetteville (Fayette County), Clay (Clay County), Grantsville (Calhoun County), Harrisville (Ritchie County), and St. Marys (Pleasants County). It misses Summersville in Nicholas County.