Bring a large pot of water to boil over high heat add 2 pounds peeled potatoes, and reduce the heat to medium high and boil for 12-15 minutes or until fork tender. Drain and rinse under cold water.
In a small bowl whisk together 1 (16-ounce) container sour cream and 1 (1-ounce) package ranch dressing mix until blended.
In a large bowl, add the cooked and drained potato pieces, 1 ¼ cups bacon, 1 ½ cups shredded cheddar cheese, and 2 bunches sliced green onions, Stir in the sour cream ranch mixture until blended and coated well.