Heat a skillet over medium heat and cook the ground turkey with the diced onion and minced garlic until the turkey is no longer pink and the onion softens.
Transfer the turkey mixture to the slow cooker.
Add the drained white beans, diced green chilies, chicken broth, chili powder, cumin, oregano, salt, and pepper.
Stir everything together, cover, and cook on low for 6 to 8 hours.
Ladle the chili into bowls and top with shredded Monterey Jack cheese and chopped cilantro before serving.