Ladislao Diwa y Nocon (June 27, 1863-March 12, 1930) was a Filipino patriot who was among the founders of the Katipunan that initiated the Philippine Revolution against Spain in 1896.
He was born in San Roque, Cavite to Mariano Diwa and Cecilia Nocon and was educated at the Colegio de San Juan de Letran and later studied for the priesthood at the University of Santo Tomas. But he had to abandon his ecclesiastical studies just before his ordination because of his father's strenuous objections.
He studied law instead and it was while he was studying law that Diwa met Andres Bonifacio who often distributed propaganda material, authored by Jose Rizal and Marcelo H. del Pilar during the Propaganda Movement in Spain, inside the university campus. The two became close friends and Diwa later boarded with Teodoro Plata at Bonifacio's house in Tondo, Manila.
Adopting the symbolic name Balete, Diwa formed the Katipunan's first triangle with Bonifacio and Plata and became the society's fiscal. He later formed a triangle of his own with Roman Basa and Teodoro Gonzales, who would respectively become president and councilor of the Katipunan's supreme council. The following year, Diwa continued to serve as councilor.
Diwa contributed to the Katipunan's expansion to the countryside because of his transfer to the court of a justice of the peace in Pampanga province. Katipuneros in Bulacan, Tarlac and Nueva Ecija claim to have been inducted into the Katipunan by Diwa himself. One of the most notable was Francisco Macabulos, who would become one of the most successful Filipino generals of the revolution.