Determining teacher supply in California is essential for policymakers as they analyze how current statutes and policies impact teacher recruitment, teaching incentives, and teacher preparation. This report provides data collected by the Commission on Teacher Credentialing (Commission) and addresses several questions regarding the supply of teachers newly available to teach in California classrooms. Education Code §44225.6 (Assembly Bill 471, Chap. 381, Stats. 1999) requires the Commission to report to the Governor and the Legislature each year on the number of teachers who received credentials, authorizations, permits, and waivers. The report includes the type and number of documents initially issued authorizing service to teach in California public schools or schools under public contract for fiscal year 2020-21. It responds to the requirements specified in statute and provides a tool for policymakers and others interested in teacher supply. The report is organized with the following headings: (1) Teacher Supply Data: New Teaching Credentials Issued in California; (2) New Teaching Credentials Issued by Type; (3) Distribution of Credentials Issued by Preparation Pathway and Type of Program Sponsor; (4) Teachers Prepared Through Alternative Certification Pathways (Intern Programs); (5) Other Types of Teaching Credentials Issued: Designated Subjects Career Technical Education and Designated Subjects Special Subjects; (6) Future Teacher Supply Indicator: Teacher Preparation Program Enrollment Data; (7) English Learner Authorizations Issued; (8) Child Development Permits Issued; (9) Teaching Permits and Waivers Issued; (10) Comparison of Fully Credentialed Teachers Serving in California Public Schools versus New Intern Credentials, Permits, and Waivers Issued; (11) Demographic Data Trend: Gender and Ethnicity Distribution of New Enrolled Teacher Candidates, Full-Time Equivalent Teachers, Enrolled K-12 Students, and California Population; and (12) Teacher Demand: Estimated Teacher Hires by Region, County, and Subject Areas.