This page lists many prominent South Park families. Characters that are deceased in the South Park universe have their names italicized.
Main Characters' Families
Broflovski / Schwartz Family
Cartman / Tenorman Family
Kern / Kimble / Marsh Family
Other Characters' Families
These are all the possible families who were seen together, but not confirmed to be actual families.
Nelly was seen with her possible parents and brother in "Free Willzyx".
Stoley / Brooks Family
Kevin Stoley's possible parents were seen ordering a "future self" resembling Kevin in "My Future Self n' Me".
Jenny Simon and Girl with Blonde Hair were seen with their possible parents and sister watching the Jonas Brothers concert in "The Ring".
Jenny's possible sister, shown in "The Ring
Jenny's possible mother, shown in "The Ring
Jenny's possible father, shown in "The Ring
Heidi has had three sets of parents, likely due to continuity errors.