Community mental health services are increasingly embracing evidence-based interventions (EBIs), and the professional workforce is diversifying to meet the needs of historically underserved groups. As such, it is increasingly important to understand how psychotherapist cultural factors may be associated with attitudes toward EBIs. The use of standardized assessments within routine progress monitoring is a cornerstone of EBIs, yet therapist attitudes remain an obstacle to implementation. The current study examines the associations between therapist cultural identity and attitudes toward and use of routine progress monitoring. An online survey was used to gather data from 229 ethnic minority community therapists delivering EBIs in a large public mental health system serving children and families. Therapists had an average age of 35.2 years (SD = 7.7), 86.5% were female, 69.9% were Hispanic/Latinx and 30.2% were other ethnic minority, 36.2% were licensed, 90.8% held a masters degree, and 76.4% reported ability to deliver services in a non-English language. Hierarchical multiple regression analyses revealed that stronger heritage cultural identity was related to perceptions of potential harm with routine progress monitoring. In addition, more favorable views of standardized assessment instructions were associated with positive attitudes toward routine progress monitoring. We discuss how findings point to the need for additional user-centered research with diverse community therapists to learn how assessment and progress monitoring can be better designed to address their cultural and racial-based concerns. (PsycInfo Database Record (c) 2020 APA, all rights reserved).