A soybean cultivar, designated SE73090, is disclosed. The invention relates to the seeds of soybean cultivar SE73090, to the plants of soybean SE73090 and to methods for producing a soybean plant produced by crossing the cultivar SE73090 with itself or another soybean variety. The invention further relates to hybrid soybean seeds and plants produced by crossing the cultivar SE73090 with another soybean cultivar.