Peter has two siblings.
Peter Griffin, the central character, has a brother and a sister, making his total number of siblings two.
Peter's Siblings
Based on available family information, Peter's siblings are:
| Relationship | Name |
|---|---|
| Twin Brother | Chip Griffin |
| Sister | Karen Griffin |
These two individuals are the only siblings explicitly mentioned in Peter's family details, confirming he has one brother and one sister.
