Youth experiencing homelessness (YEH) often face increased levels of adversity and higher rates of trauma, suicide, and mortality compared to their housed peers. A multi‐level life course lens is proposed by applying the ecobiodevelopmental model to examine social support mechanisms as a buffer to psychopathologies following adversity within YEH. Further discussion contributes to the theoretical basis for future public health research and intervention work addressing youth homelessness and related adversities.