Flag and Code of arms

 
 
The flag consist of three horizontal stripes of equal width. The top and bottom stripe are yellow and the center one green. The yellow stripes represent the Taínos villages two hundred years before the discovery of the new world and the gold they used. Green represent the first people inhabit Isabela and the rest of the island, IX century.
     
The of the colors of the flag apply equally to code of arms. The gold bell represented in the center stripe between two cactus is a symbol of the town of San Antonio de la Tuna. The two cocks represent the bravery of the inhabitants and Isabela's famous fighting cocks. The horse represents the cattle wealth of the region and honors the fine step horses (Paso Fino) for which Isabela is famous. The crown has three towers, a standard emblem for Puerto Rico cities.