In this paper I am interested in the question of whether and why states should prioritize child refugees over adult refugees in cases where they are not able to grant refuge to all those who are entitled to it. In particular I discuss three grounds on which such a prioritization could be based: (a) vulnerability, (b) efficiency and (c) life phase and life span. As can be shown, these grounds also apply, to some extent, to particular groups of adults such (...) as women, the elderly, or people with special needs. Based on this I conclude that states should invest significant resources into filtering out those who are the most needy and vulnerable although there are several limitations to doing that. Only if such a selection process were impossible, or so costly and time-consuming that it would result in significantly fewer refugees being admitted, would states have good moral reasons to prioritize children without further screening. (shrink)