A cotton cultivar, designated DP 570 BGII, is disclosed. The invention relates to the seeds of cotton cultivar DP 570 BGII, to the plants of cotton DP 570 BGII and to methods for producing a cotton plant produced by crossing the cultivar DP 570 BGII with itself or another cotton variety. The invention further relates to hybrid cotton seeds and plants produced by crossing the cultivar DP 570 BGII with another cotton cultivar.