Parents' management of their children's sibling relationships, or sibling-focused parenting, has substantial theoretical and practical importance but is rarely studied. This study's goals were to describe dimensions of sibling-focused parenting and to examine sociocultural resources and challenges as potential correlates among Latinx mothers and fathers in 262 families with two children in middle childhood. Families were recruited from 11 public elementary schools, and caregivers (248 mother figures; 118 father figures) participated in a home visit and phone interviews at the onset of the study. Sibling-focused parenting included three dimensions: positive guidance (10 items), nonintervention (four items), and authoritarian control (five items). Parents rated positive guidance as their most frequent strategy, and comparisons of mothers and fathers from the same families revealed that mothers engaged in more sibling-focused parenting overall than fathers. Regarding correlates, mothers' familism values and mothers' and fathers' family cohesion reports were associated with more positive guidance and mothers' cohesion was negatively related to nonintervention in sibling conflicts. For mothers only, parenting stress was linked to all three dimensions of sibling-focused parenting-negatively to guidance and positively to authoritarian control and nonintervention; maternal depressive symptoms were positively linked to authoritarian control. Economic hardship was not a significant correlate of any dimension. Findings suggest that sibling-focused parenting is a key domain of parenting in need of further research. (PsycInfo Database Record (c) 2024 APA, all rights reserved).