According to the invention, there is provided a novel soybean variety designated XB58K05. This invention thus relates to the seeds of soybean variety XB58K05, to the plants of soybean XB58K05 to plant parts of soybean variety XB58K05 and to methods for producing a soybean plant produced by crossing plants of the soybean variety XB58K05 with another soybean plant, using XB58K05 as either the male or the female parent.