The Del Sol Quartet is a string quartet based in San Francisco, California that was founded in 1992 by violist Charlton Lee.

Del Sol has commissioned and premiered thousands of works from a diverse range of international composers, including Terry Riley, Frederic Rzewski, Tania León, Mason Bates, Gabriela Lena Frank, Huang Ruo, Michael Harrison, Ben Johnston, Chinary Ung, Daniel Bernard Roumain, Kui Dong, Mohammed Fairouz, Theresa Wong, Erberk Eryilmaz, Ken Ueno, Peter Sculthorpe, Pamela Z, Reza Vali, Per Nørgård.

As of 2023, quartet members are Benjamin Kreith (violin), Hyeyung Sol Yoon (violin), Charlton Lee (viola), and Kathryn Bates (cello). Hyeyung Sol Yoon, formerly of the Chiara String Quartet, succeeded violinist Samuel Weiser.