Background: Children’s right to participate in data collection during emergencies has been widely recognized by humanitarian actors. However, participation in such activities can expose children to risk. Methods: We employed a three-round Delphi technique with a purposive sample of 52 child protection specialists. Results: Respondents identified capacity and contextual considerations as important factors influencing participation decisions, though they sometimes disagreed about how these factors should determine participation. Respondents also considered the role of individual child factors and the presence of caregivers in selecting child participants, and proposed best practice approaches for securing children’s safe and meaningful participation. Conclusions: With almost half of statements reaching clear consensus, these findings reflect broad agreement within the sector about engaging children in data collection in emergencies. At the same time, points of ongoing debate around how to factor different risks into child participation decisions may indicate discordant practice.