Procopio Bonifacio y de Castro (c. 1873 – May 10, 1897) was a Filipino independence activist and revolutionary during the Philippine Revolution of 1896 against Spain.
With Andres Bonifacio, Candido Tirona, Emilio Jacinto and Pio Valenzuela they founded the Council of the Ancient Assignment in Kawit, Cavite.
Andres Bonifacio who was recognized as the over-all leader of the revolution and of the Katipunan, was insulted and disrespected by a Magdalo officer.
While they were leaving Cavite, they were the target of a surprise attack (ARREST ORDER due to Treason as initially evidenced by the ACTA de Tejeros itself) by Emilio Aguinaldo's men led by Gen. Agapito Bonzon and Gen. José Ignacio Paua due to some events[clarification needed] while they were encamped in a village in Indang.
The two remaining brothers were then brought to Naic for a trial, then to Maragondon, and were subjected to a court-martial as ordered by the war council under the new revolutionary government.