Poor-quality early childhood education and care (ECEC) can be detrimental to the development of children, as it may lead to poor social, emotional, educational, health, economic, and behavioral outcomes. A lack of consensus, however, regarding the strength of the relationship between teacher qualification and the quality of the ECEC environment makes it difficult to identify strategies that could enhance developmental and educational outcomes. This meta-analytic review examines evidence on the correlation between teacher qualifications and the quality of ECEC environments. Results show that higher teacher qualifications are significantly correlated with higher quality ECEC environments. Specifically, the education level of teachers or caregivers is positively correlated to overall ECEC qualities, as well as subscale ratings including program structure, language, and reasoning.