This article investigates influences on academic achievement among Vie
tnamese American high school students. Theorists have offered a variet
y of explanations for Asian American academic success, and characteris
tics of individual families have received particular attention in many
of these explanations. Here, it is argued that the academic success o
f Vietnamese American students may be understood as the product of ''s
ocial capital,'' or tightly integrated sets of associations, within Vi
etnamese American communities. If this is the case, it is further argu
ed, high levels of scholastic performance among Vietnamese American yo
uth should be proportionate to their involvement with an ethnic commun
ity. The article uses data from a specific Vietnamese American communi
ty to find whether community involvement by adolescents and their fami
lies is in fact associated with academic achievement Participation in
an ethnic church, proportion of friends who are Vietnamese, and attend
ance at after-school Vietnamese classes are used as indicators of adol
escents' community involvement. Membership in ethnic community organiz
ations is used as an indicator of parental community involvement. Find
ings support the contention that the involvement of Vietnamese America
n adolescents and of their parents in the ethnic community are strong
predictors of academic achievement and that the structure of individua
l families promotes scholastic performance primarily by promoting comm
unity involvement.