The name Nelson can refer to a number of South Park characters, listed below:
- Nelson Brown - A member of the South Park Pee-Wee Hockey team.
- Nelson (geologist) - Randy's coworker.
- Patty Nelson - A student at the South Park Elementary.
- Tammy Nelson - Another student at South Park Elementary (no known relation).
- Annie Nelson - Yet another student at South Park Elementary (also no known relation).
- Dr. David Nelson - A man with dwarfism who appeared in "With Apologies to Jesse Jackson".