According to the invention, there is provided a novel soybean variety designated 91M61. This invention thus relates to the seeds of soybean variety 91M61, to the plants of soybean 91M61 to plant parts of soybean variety 91M61 and to methods for producing a soybean plant produced by crossing plants of the soybean variety 91M61 with another soybean plant, using 91M61 as either the male or the female parent.