A novel soybean cultivar, designated S030157, is disclosed. The invention relates to the seeds of soybean cultivar S030157, to the plants of soybean S030157 and to methods for producing a soybean plant produced by crossing the cultivar S030157 with itself or another soybean variety. The invention further relates to hybrid soybean seeds and plants produced by crossing the cultivar S030157 with another soybean cultivar.