Luis Rafael Yangco y Ronquillo (August 19, 1841- October 16, 1907) was a Filipino-Chinese businessman and philanthropist who is popularly known during the Spanish colonial era as the "King of Manila Bay and Pasig River" for his vast shipping empire and extensive commercial shipping activities. He is also one of the Filipino-Chinese businessmen suspected of providing logistical and financial aid to the Katipunan during the Philippine Revolution.