The fall semester at The Ohio State University (OSU) for the year 2025 is scheduled to start on Tuesday, August 26, 2025. This is based on the university's typical academic calendar patterns, with the autumn semester generally beginning in late August and going through mid-December.

If you meant Oregon State University by "OSU," their fall term for 2025 starts later, on September 24, 2025.

Please specify if you meant a different OSU or need more detailed scheduling info.