Shield: From the Provincial Seal of Isabela where the town is located.

1957: Year when Municipality was founded by virtue of Republic Act No. 2048.

Rising Sun: Hope for a bountiful harvest.

Blue: Loyalty of people to government.

Red: Bravery of people who rallied to change its name and bad image.

Yellow: Self-sufficiency among people of San Manuel.

Pair of Wings: Contribution of Municipality in development of the Nation.

Rice Stalks w/ 19 Grains: Primary source of income of town and number of Barangays.

Corn: Secondary product of the Municipality.

Green Field & Carabao: Vast agricultural land area of the town.