Add everything to your slow cooker. Cover. Cook for 6 to 8 hours on low or 4 hours on high. You'll know it's done when chicken shreds easily with a fork.
Shred chicken and place back in the chili.
Ladle chili into bowls and top with cheese, cilantro, avocado, sour cream, tortilla chips, or homemade croutons.
Notes
If you want to add some heat, use two 4 1/2 oz cans of diced green chiles instead of one.Stovetop instructions can be found above this recipe card.