Abstract: A siding starter clip comprised of sheet metal material, including an upper extended nailing leg portion having a plurality of apertures therein for fastening to the side of a structure by securing nails therethrough, a medial projecting leg portion which extends from the upper nailing leg portion at an obtuse included angle therewith, a lower depending leg portion which extends from the medial projecting leg portion at an acute included angle therewith for engaging a siding starter panel, and gussets extending substantially the length thereof, installable in a convenient and efficient manner to provide strengthened support for, and adjustable interlocking engagement with, a siding starter panel.