Shield: From the Provincial Seal of Batanes where the town is located.
Six Stars: Six (6) Barangays of the Municipality.
Lion: Spanish rule and Christian influence
Eagle: American rule and its educational contribution.
Circle: Basco as provincial capital and melting pot.
Mountain: Mt. Iraya, one of the tourism potentials of Basco.
Breadfruit Tree: Municipal tree, a good source of quality lumber and rubber.
Cow: Industry and source of livelihood of 25% of its population.