Background: Ethics consultants (ECs) are increasingly expected to possess core knowledge and skills. Few data address whether ECs actually possess recommended core knowledge. We aimed to measure pediatric ECs’ understanding of ethical principles, identify knowledge gaps, and explore associations between experience/training and knowledge in pediatric ethics consultations. Methods: We identified the 2 ECs most knowledgeable in pediatric ethics from each of 45 freestanding children's hospitals and an equal number of general teaching hospitals in the United States. This yielded a sample of 159 eligible pediatric ECs. Pediatric ECs were sent a survey measuring ethics training, characteristics of the ethics consultation service, and EC knowledge, as assessed by a previously validated scale entitled the Test of Residents’ Ethics Knowledge for Pediatrics (TREK-P). Of 102 completed surveys received, 99 were used in the analysis. Results: Seventy-three percent of ECs had completed ≥1 formal training modality, most commonly bioethics mini-courses, master's degrees, or certificate programs (20–30% each). Respondents infrequently received salary support (32%) or had a budget (28%) to support ethics work. The median TREK-P score was 19 (interquartile range [IQR] 17–21). Forty percent of subjects scored ≥20, surpassing the threshold of adequate performance proposed in previous work. Median scores were significantly higher among ECs with formal training in ethics but did not differ significantly by other variables. In secondary analyses, high scores (≥20) were significantly more common among ECs receiving salary support (55% vs. 33%, p = 0.04) and who had formal ethics training (47% vs. 22%, p = 0.02). Items pertaining to privacy, genetic testing, and assent, were answered incorrectly by >33% of ECs. Conclusions: High scores on a validated ethics knowledge scale were more common among ECs with salary support or formal ethics training. The study highlights knowledge gaps that warrant consideration as EC becomes a professionalized endeavor.