The San Diego County Fair takes place from June 10-July 5, 2026 in Del Mar, California, featuring a diverse lineup spanning hip hop, pop, rock, country, and alternative music. Major headliners include electronic dance music superstar Marshmello, rap icon Nelly, rock legends Chicago, and country artist Maren Morris alongside alternative acts like AJR and Good Charlotte. The festival also showcases prominent regional Mexican artists including Banda Machos, Los Tucanes De Tijuana, and Conjunto Primavera. This month-long celebration offers music fans in Southern California an extensive variety of genres and artists all in one location.