Abstract: A safety trailer step provides improved footing for a person launching or loading a boat onto a trailer. The safety trailer step comprises a step formed with a platform and two parallel side plates. The side plates snugly receive the trailer tongue therebetween and extend below the tongue. Tightening bolts through the side plates sandwiches the tongue therebetween to rigidly mount the safety trailer step to the trailer tongue. The platform may be centered over the tongue, or it may be laterally offset therefrom. A non-skid plastic plate may be attached to the platform upper surface. The present invention includes spacers that fit between the tongue and the step such that the safety trailer step can be used with a variety of trailer tongue widths.