Family-centered care recognizes families as central to child health and well-being and prioritizes clinician collaboration with families to ensure optimal pediatric care and outcomes. Clinician interpersonal sensitivity and communication skills are key to this approach. To examine perceptions of and factors associated with family-centered care among clinicians working in pediatric and congenital heart care. In this cross-sectional study, participants from diverse clinical disciplines (pediatric cardiology, cardiothoracic surgery, nursing, anesthesia, neonatology, intensive care, psychology, and others), completed an online survey between June 2020 and February 2021. Participants included physicians, surgeons, nurses, and allied and mental health professionals at an Australian quaternary pediatric hospital network. Statistical analysis was performed from August 2022 to June 2023. Family-centered care across 4 domains (showing interpersonal sensitivity, treating people respectfully, providing general information, and communicating specific information) was measured using the validated Measure of Processes of Care for Service Providers. Clinician burnout (emotional exhaustion, depersonalization, and personal accomplishment), confidence responding to families' psychosocial needs, and psychological, clinical role, and sociodemographic factors were also assessed. Informed by theory, hierarchical linear regression was used to identify factors associated with family-centered care. There were 212 clinicians (177 women [84.3%]; 153 nurses [72.2%], 32 physicians [15.1%], 22 allied and mental health professionals [10.4%], 5 surgeons [2.3%]; 170 [80.2%] aged 20-49 years) who participated (55% response rate). Of the 4 family-centered care domains, scores for treating people respectfully were highest and associated with greater clinician confidence responding to families' psychosocial needs (effect size [β], 0.59 [95% CI, 0.46 to 0.72]; P < .001), lower depersonalization (β, 0.04 [95% CI, -0.07 to -0.01]; P = .02), and a greater sense of personal accomplishment at work (β, 0.02 [95% CI, 0.01 to 0.04]; P = 0.04). Greater interpersonal sensitivity was associated with greater confidence responding to families' psychosocial needs (β, 0.80 [95% CI, 0.62 to 0.97]; P < .001), a greater sense of personal accomplishment at work (β, 0.03 [95% CI, 0.01 to 0.05]; P = .04), and lower use of approach-based coping, such as problem-solving (β, 0.37 [95% CI, -0.71 to -0.02]; P = .04). In this cross-sectional study, burnout and confidence responding to families' psychosocial needs were associated with clinicians' perceptions of family-centered care. These findings suggest that targeted interventions to address these factors may benefit clinicians and also potentially strengthen the practice of family-centered care in pediatric and congenital heart settings.