Alpha Psi () is an American social and professional Veterinary Medicine fraternity. It was founded at the Ohio State University College of Veterinary Medicine in 1907.
Founded by 22 juniors and seniors in veterinary medicine at the Ohio State University, Alpha Psi was established on January 18, 1907. Its purpose was both social and professional.
From its beginnings, the fraternity was planned to spread throughout the United States and Canada. The fraternity gradually spread to other colleges of veterinary medicine when students formed chapters at many veterinary schools in the United States. By 1915, it had fifteen chapters.
As of 2024, it had eleven active chapters. Its membership is open to both men and women.
Delta chapter and Gamma chapter became inactive when their host schools closed.
The colors of Alpha Psi are dark blue and bright gold. Its flower is the red carnation. Its publication is Alpha Psi Quarterly.
Following are the chapters of Alpha Psi. Active chapters are indicated in bold. Inactive chapters are in italic.