Shield: From the Provincial Seal of Ilocos Sur where the town is located.
Buri Weaving: Mat weaving, one of the cottage industries the Municipality is known for; Buri palm thrives in the area is abundant, providing year-round supply of raw materials of hat, bag, and sleeping mats.
Tobacco Leaf: Primary cash crop of the Municipality which produces quality Virginia Tobacco.
Garlic & Onion: Farm products of San Juan.
Anvil & Hammer: Blacksmithing, the common home industry of the Municipality which produces razors and scissors skillfully.
Cow's Head: Cattle production of the Municipality.