Civic engagement is an important marker of thriving among adolescents, and more research is needed that clarifies the ecological assets (positive supports across settings) that foster youth civic engagement. Simultaneously modeling associations between multiple ecological assets and civic behaviors can provide a nuanced view of the way adolescents' ecological assets relate to distinct forms of civic engagement. To advance positive youth development theory, we used a bifactor modeling approach to examine general and specific ecological asset factors in relation to volunteering, conventional political, online political, and informal helping behaviors. In a large ethnically diverse sample of adolescents, the general ecological asset factor was positively associated with informal helping only. Classroom civic learning opportunities were positively associated with volunteering, conventional, and online political behaviors. Family political discussions were positively associated with conventional and online political behaviors. Our study suggests that civic engagement should be understood multidimensionally and that broad and specific ways of conceptualizing ecological assets have merit for understanding different types of youth civic engagement.