Final answer:
The McCoy family lived in Pike County, Kentucky. Their feud with the Hatfields is a notable part of American history and Kentucky's cultural heritage.
Step-by-step explanation:
The McCoy family, famous for their feud with the Hatfield family, resided in Pike County, Kentucky. This historic feud is often mentioned when discussing family feuds or vendettas in American history. Pike County became a well-known location due to the conflict that lasted from 1863 to 1891 between these two families. The feud has been depicted in literature, television, and other forms of media, and is a part of Kentucky's cultural history.