According to the invention, there is provided a soybean variety designated XB24H03. This invention thus relates to the seeds of soybean variety XB24H03, to the plants of soybean XB24H03 to plant parts of soybean variety XB24H03, and to methods for producing a soybean plant by crossing plants of the soybean variety XB24H03 with another soybean plant, using XB24H03 as either the male or the female parent.