In a large mixing bowl, combine the shredded chicken and ranch dressing. Mix well until the chicken is evenly coated.
Add the chopped bacon, shredded cheddar cheese, diced tomatoes, and green onions to the chicken mixture. Stir until all ingredients are well combined. Season with salt and pepper to taste.
Lay out the flour tortillas on a clean surface. Divide the chicken mixture evenly among the tortillas, placing it in the center of each.
Top each filling with a handful of shredded lettuce.
Fold in the sides of each tortilla, then roll from the bottom up to create a wrap. Ensure the filling is securely enclosed.
If desired, slice each wrap in half diagonally and serve immediately, or wrap in foil for later.