Critical consciousness (CC) is associated with beneficial developmental outcomes among youth contending with oppression, yet we know little about how CC develops and how the three dimensions of CC (i.e., critical action, critical motivation, and critical reflection) interrelate over time. Therefore, this study employed second-order latent growth modeling to illuminate the longitudinal interplay between the three dimensions of CC among 518 youth activists (M[subscript age] = 16; girls = 53%; 11% Asian, 20% Black, 39% Latinx, 8% Multiracial, and 6% White). Youth demonstrated significant growth in critical reflection and action over time, but not in critical motivation. Participation in community-based activism was positively associated with CC development. Altogether, these findings illuminate channels for fostering youth CC and increase our understanding of CC's dynamic development.