Santo tomas

Shield: From the seal of the Province of La Union divided into 4 portions w/ the sun inside a small circle at the center against a background divided into 2 parts; blue on top, and red at the bottom.

Tobacco Plant & Plow: At the upper left portion of the shield: Farming as the town's principal source of income.

Earthen Jars: At the upper right portion of the shield: Pottery as the leading industry of the municipality.

Fishing Boat: At the lower left portion of the shield: Fishing and other sea-based industries, town's principal "cash" products.

Wheel: At the lower right portion of the shield: Post-harvest facilities and commerce.

Scroll: "naimpusoan nga panagserbi" (whole-hearted public service), town's motto.

Golden Yellow: Richness in aims and fullness of mind and heart.

Blue: Peace, justice, equanimity, tranquility,and calmness.

Red: Industry, initiative, activity and aggressiveness.

1764: Year the Municipality was founded.