The American String Teachers Association (ASTA) is a professional organization for bowed string music teachers based in the United States. It is the largest organization in the U.S. for string teachers. ASTA serves teachers and students in all areas of stringed instruments from kindergarten to the collegiate level, private teachers, performers, institutions of higher learning and business partners serving all instruments, accessories, sheet music and more for the teachers, students and players of stringed instruments.

Another key goal of the association is providing learning opportunities to play bowed string instruments for the next generation of American students and to place those students into orchestras as they grow more proficient. Besides advocating for string instrument study at all age and proficiency levels in various frameworks, ASTA provides professional development, online and print resources for pedagogical content, scholarly publications, music advocate resources, student-level competitions and evaluation programs, a career center, community connections through state chapters, and other resources.