[3] According to legend, while a Spaniard was exploring a dense forest in what is now Orani, Bataan, he encountered a native who was chopping down a large tree.

Orani grew into a prosperous town, but suffered significant damage during the earthquake of September 16, 1852, which destroyed the church and municipal government building.

Cut flowers like aster, chrysanthemum and gerbera are locally cultivated while bamboo and jungle vines can be gathered from Orani's forestlands.

Aquamarine resources like milkfish, tilapia, prawn, crabs, mussels and oysters are caught in Orani's fishing grounds and fishponds.

During the American rule (1898–1946) (History of the Philippines (1898-1946)), the elected Mayor and local officials, including the appointed ones held office at the Municipal Hall.

Orani, Bataan's incumbent elected officials are - Mayor Efren Dominic E. Pascual, Jr. and Vice Mayor Emmanuel Bati Roman., including 8 Councilors or Sanguniang Bayan Members:[24][25] Jose Gener Quiambao Pascual, Maria Abba Narciso Sicat, Francis Sevilla Dela Torre, Jun Anthony Ignacio Reyes, Mayfair Bongco Sibug, Bonifacio Francisco Cruz Jr. ,Renato Rodriguez Bugay, Miguel Salonga Paredes.

Cristina J. Mendoza-Pizzaro holds office in her sala located at the second floor of the MTC building at the back of the Town hall.