The Grant family is a wealthy family residing in National City.
Known family members
- Katherine Grant (Cat's mother, Adam and Carter's maternal grandmother)
- Cat Grant (Katherine's daughter, Mr. Foster's ex-wife, Adam and Carter's mother)
- Adam Foster (Mr. Foster and Cat's son, Carter's maternal half-brother and Katherine's grandson)
- Carter Grant (Cat's son, Adam's maternal half-brother and Katherine's grandson)