Abstract: This experiment was conducted at Federal College of Forestry, Jos to determine the effect of glyphosate herbicide on the growth and yield parameters as well as the protein concentration of groundnut (Arachis hypogaea). The experiment consist of Randomized Complete Block Design (RCBD) where four treatments were involved in which the control (To) is without glyphosate, while T1, T2, and T3 contained 4ml, 6ml and 8ml of glyphosate herbicide per 100ml water solution respectively applied per 4m2 experimental plot.