The Baccalaureate and Beyond Longitudinal Study 2000, Base Year (B&B:2000) is part of the Baccalaureate and Beyond Longitudinal Study (B&B) program. B&B:2000 (https://nces.ed.gov/surveys/b&b/) is a base year of a longitudinal study that followed a cohort of graduating college seniors who participated in the 2000 National Postsecondary Student Aid Study (NPSAS:2000). The 2000 National Postsecondary Student Aid Study (NPSAS:2000) data provided the base-year sample for B&B:2000. NPSAS:2000 data are representative of all undergraduate and graduate students enrolled in postsecondary institutions in the 50 United States, the District of Columbia, and Puerto Rico that were eligible to participate in the federal financial aid programs in Title IV of the Higher Education Act, and the B&B cohort is a representative sample of graduating seniors in all majors. Key statistics produced from B&B:2000 are information on bachelor’s degree recipients’ undergraduate experience, demographic backgrounds, expectations regarding graduate study and work, and participation in community service.