According to the invention, there is provided a novel soybean variety designated XB03QO7. This invention thus relates to the seeds of soybean variety XB03QO7, to the plants of soybean XB03QO7 to plant parts of soybean variety XB03QO7 and to methods for producing a soybean plant produced by crossing plants of the soybean variety XB03QO7 with another soybean plant, using XB03QO7 as either the male or the female parent.