The New World String Quartet was a classical music string quartet formed in Grand Rapids, Michigan, United States, in 1975 and active through the early 1990s. Founding members were: Yosef Yankelev and William Patterson, violins; Yuri Vasilaki, viola; and Ross Harbaugh, cello. These were also the members in a 1981 Minnesota Public Radio interview and performance. As of 1983, members were: Curtis J. Macomber and William Patterson, violins; Robert Dan, viola; and Ross T. Harbaugh, cello. These are also the members listed on the quartet's recording of Ben Johnston's String Quartet No. 6. As of 1985, members were: Curtis Macomber and Vahn Armstrong, violins; Robert Dan, viola; and Ross Harbaugh, cello. Members on recordings in the late 1980s and early 1990s included Curtis Macomber and Vahn Armstrong, violins; Benjamin Simon, viola; and Ross Harbaugh, cello. The quartet also recorded a Brahms piano quintet with Derek Han, piano.