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.