Preheat oven to 375 degrees. In a large bowl, combine corn, soup, milk, celery, seasoned salt, 1/4 cup cheese and 1/2 can onions. Crumble 3 slices bacon; stir into corn mixture. Spoon into 8-inch square baking dish.
Bake, covered, at 375 degrees for 40-45 minutes or until hot and bubbly. Top with remaining bacon slices, cheese and onions, bake, uncovered, 3 minutes or until onions are golden brown.