A toilet seat includes a lid, a splash guard, and a seat. The splash guard is affixed to a perimeter edge of the seat in a sealed manner. The splash guard is composed of flexible members including a plurality of flat sections being connected by fan-fold pleat sections. The splash guard lays flat for normal seated use, or may be deployed upward to form a vertical barrier to contain and direct any liquids into the toilet bowl. In a preferred embodiment, the splash guard and seat are horseshoe-shaped.