San Ignacio or San Ignacio de Piaxtla is a city and seat of the surrounding San Ignacio Municipality in the Mexican state of Sinaloa.
It stands at . The municipality reported 4,543 inhabitants in the 2010 census.
In 2023, San Ignacio was designated a Pueblo Mágico by the Mexican government, recognizing its cultural and historical importance.
In this town actress Ofelia Cano was born.