Plankton is a disambiguation. It may refer to:
- Sheldon J. Plankton - Founder of the Chum Bucket and rival of Mr. Krabs.
- Papa Plankton - Sheldon's father.
- Karen Plankton - Sheldon's wife.
- Grandma Plankton - Sheldon's grandmother.
- Plankton's Cousins - Sheldon's cousins.
- Plankton Family - Sheldon's family.
- Plankton's Robot - A robot customer seen in "Plankton's Army."
- Plankton! - A Season 1 episode.
- Plankton's Army - A Season 3 episode.
- Plankton's Regular - A Season 6 episode.
- Plankton's Good Eye - A Season 8 episode.
- Plankton's Pet - A Season 9 episode.