National Primary Route 6, or just Route 6 (, or ) is a National Road Route of Costa Rica, located in the Alajuela, Guanacaste provinces.
In Alajuela province the route covers Upala canton (Upala, Bijagua, Canalete districts).
In Guanacaste province the route covers Bagaces canton (RÃÂo Naranjo district), Cañas canton (Cañas, Palmira districts).