San Diego Unified School District | 23,356 followers on LinkedIn. Make a difference EVERY DAY. Apply to work for San Diego Unified and make San Diego a better place. | The San Diego Unified School District (SDUSD) serves over 96,000 students, and has marked more than 150 years of service to San Diego's children. It is the second largest district in California, and eighth largest urban district in the United States. The student population is extremely diverse, representing more than 15 ethnic groups and over 60 languages and dialects.