An a masonry corner jig includes a main elongate body including first and second portions extending from a midpoint, the main elongate body forming a plurality of apertures extending a length of the main elongate body at the midpoint; first and second legs; first and second L-shaped plates each defining a central leg bracket; an adjustable grade stake; a metal plate defining a base; first and second legs each including a leg hinge, a leg rod, an adjusting rod, the adjusting rod forming hole through the center of the adjusting rod, an adjusting pin that is sized and configured for engaged passage through the hole of the adjusting rod, a cylinder defining an ankle rod, and a foot plate that is sized and configured for attachment to the first end of the ankle rod.