In a 3-quart or 6-quart crock pot, add the chicken, cream cheese, shredded colby jack cheese, buffalo wing sauce, and ranch dressing. Stir everything well to combine evenly.
Set the crock pot to LOW and cook for 1-1/2 to 2 hours until the dip is hot and bubbly, stirring occasionally to prevent sticking.
Once heated through and well mixed, transfer to a serving dish if desired. Serve warm with tortilla chips, carrot sticks, and celery sticks for dipping.
Enjoy your creamy, cheesy, and spicy Crock Pot Buffalo Chicken Dip with friends and family!