Abstract: A ladder leveling device including an upper block portion couplable with respect to a bottom of a ladder leg. The upper block portion has a generally rectangular configuration defined by a closed upper end, an open lower end, a front wall, a back wall and opposed side walls. The front wall has a longitudinal slot formed therein. A lower block portion is coupled with respect to the upper block portion. The lower block portion has a generally rectangular configuration defined by an upper end, a lower end, a front wall, a back wall and opposed side walls. The upper end is slidably received within the open lower end of the upper block portion. The front wall has a bolt extending outwardly therefrom for being positioned within the longitudinal slot of the upper block portion whereupon a nut can be tightened on the bolt to fix a height of the upper block portion with respect to the lower block portion. A glass bubble level is provided that can be secured to the leg of the ladder above the upper block portion.