Morong was an administrative division of the Philippines that existed as a politico-military district created out of parts of the provinces of Tondo and Laguna on February 23, 1853, by a decree of the Superior Gobierno, composing Morong, Pililla, Tanay, Baras, Binangonan, Jalajala, Angono and Cardona from Laguna; and Antipolo, Boso-Boso, Cainta and Taytay from Tondo.

[2] Three years after the issuance of Royal Decree of Spain in 1844, provincial organizations were reclassified into provinces, districts, and politico-military units.

At that time, the province of Tondo had religious jurisdiction over Pueblo de Morong and Laguna over all governmental, commercial, industrial and social affairs.

The last stronghold of Spain in Distrito de Morong happened when the Spaniards, holed out in the convent surrendered to the Katipuneros on August 19, 1898.

However, through Don Juan Sumulong, General Miguel Malvar advised the Morongueños to surrender to the American flag.

On June 5, 1901, 221 delegates from the Distrito de Morong and a portion of Manila Province had an assembly at Pasig Church.