Frank is a disambiguation. It may refer to:
- Frank (citizen) - an orange fish.
- Frank (lifeguard) - a lifeguard at Goo Lagoon.
- Frank (muscular goldfish) - big brown fish with muscles.
- Frank (red shirt) - a brown fish with a red shirt.
- Frank (spatula) - Patrick's spatula.
- Frank (store owner) - owner of the Palace of Pranks.
- Frank the Guard - A cop.
- Frank (whale) - a whale in "You Don't Know Sponge."