Crisp up the cooked bacon in a pan or microwave until crunchy. Crumble it into small pieces and set aside to cool.
Cut cucumbers into ¼-inch rounds. If using English or mini cucumbers, there's no need to peel them.
In a bowl, stir together the sour cream and ranch seasoning mix until smooth and creamy.
In a large bowl, combine sliced cucumbers, shredded cheddar cheese, crumbled bacon, red onion, and dill.
Pour the ranch dressing over the cucumber mixture and gently mix until everything is well coated.
Season with salt and pepper to taste. Serve immediately or chill in the refrigerator for about 10–15 minutes.