Although placing mental health services in schools increases access to care, racial/ethnic disparities persist within the scope of school-based mental health services. Universal mental health screening is a potential strategy to increase problem detection and reduce disparities in care provision. However, no study has experimentally tested the effect of universal screening on patterns of service utilization across racial groups and the potential to reduce disparities. Using a cluster randomized design, we compared service linkage patterns among 7th- and 8th-grade Asian American and Latino students (N = 2,494; Mage = 13.65) in schools that either conducted or did not conduct universal depression screening. Multilevel analyses showed that enrollment in a universal screening school, Latino ethnicity, and low academic performance were associated with greater likelihood of referral. However, these factors were not related to caregiver consent or treatment initiation. Screening-triggered referrals were less likely to result in caregiver consent compared to routine referrals. Furthermore, universal screening did not result in a statistically significant reduction in racial/ethnic disparities in treatment referral. Implications for engaging ethnic minority families beyond the point of problem recognition and referral are discussed.