Objectives: PEERS® for Preschoolers (P4P) is an evidence-based, parent-assisted social skills program for young autistic children and children with other social challenges. The program aims to promote age-appropriate social skills and improve peer relationships. Parent employment status and cultural background may influence families’ engagement in the program and their relationship with providers, which can affect use of P4P skills outside weekly sessions. This study examined whether these parent demographic characteristics predicted program response in P4P. Methods: Participants were 46 autistic children (mean age=4.50 years; 78.3% male) and their caregivers who completed P4P between 2015 and 2019. Families took part in a 16-week curriculum with parallel child and parent groups. Program outcomes were measured using parent-report instruments, including the Social Responsiveness Scale–Second Edition, Social Skills Improvement System subscales of Social Skills and Problem Behaviors, Quality of Play Questionnaire, and Parenting Stress Index, Fourth Edition, Short-Form. Results: Significant improvements were found in child social responsiveness, social skills, behavior problems, number of playdates, and parenting stress from pre- to post-P4P. Parent employment status and race/ethnicity did not significantly predict any program outcomes. Conclusion Results indicate that P4P benefits families broadly, with no observed effect of parent employment status or race/ethnicity on outcomes. Future research should replicate these findings in a larger, more diverse sample and examine additional potential predictors of program response to inform clinical decision-making.