Oregon State Academic Calendar 2025‑2026: Important Dates

The Oregon State Academic Calendar 2025‑2026 is your all-in-one guide for every important deadline from enrollment and payment due dates, add/drop windows, to campus holidays and final exam schedules.

Oregon State University follows a quarter system, with four terms of roughly 11 weeks of instruction plus one week for finals, ensuring a balanced, compact academic rhythm.

• Fall: late September to mid‑December (11 instructional weeks + finals).
• Winter: January to late March
• Spring: late March to mid‑June (11 instructional weeks + finals)
• Summer: Oregon State offers a flexible Summer Session with multiple term options.

Whether you’re planning your Fall quarter class load, jumping into a Summer block, or getting ready for finals, the Oregon State Academic Calendar 2025‑2026 ensures all your dates and deadlines are clearly mapped, helping you thrive at Oregon State University.

Oregon State Academic Calendar Fall 2025

1. Priority registration opens on Monday, May 19, 2025.
2. The Fall Term begins, and classes start on Wednesday, September 24, 2025.
3. The last day to add a course online without department approval is Monday, October 5, 2025.
4. The last day to drop a course for a 100% tuition refund is Monday, October 5, 2025.
5. The deadline to audit a course runs from Tuesday, October 7, 2025, to Friday, October 11, 2025, by 5:00 p.m.
6. The last day to add a course online with department approval is Sunday, October 12, 2025.
7. The deadline to withdraw from a course with a 50% tuition refund is Saturday, October 19, 2025.
8. The last day to change the grading basis of a course is Friday, November 14, 2025, by noon.
9. The final deadline to withdraw from a course with no refund available is Friday, November 14, 2025.
10. The last day to withdraw from the entire term is Friday, December 5, 2025.
11. Graduate students must apply for graduation by Friday, December 5, 2025.
12. The last day of classes for the Fall Term is Friday, December 5, 2025.
13. Final examinations occur from Monday, December 8, 2025, to Friday, December 12, 2025.
14. The Fall Term ends on Friday, December 12, 2025.
15. Final grades become available online on Wednesday, December 17, 2025.

Oregon State Academic Calendar Winter 2026

1. Priority registration opens on Monday, November 17, 2025.
2. The Winter Term begins, and classes start on Monday, January 5, 2026.
3. The last day to add a course online without department approval is Sunday, January 11, 2026.
4. The last day to drop a course for a 100% tuition refund is Sunday, January 11, 2026.
5. The deadline to audit a course runs from Monday, January 12, 2026, to Friday, January 16, 2026, by 5:00 p.m.
6. The last day to add a course online with department approval is Saturday, January 18, 2026.
7. The deadline to withdraw from a course with a 50% tuition refund is Saturday, January 25, 2026.
8. The last day to change the grading basis of a course (e.g., Credit/No Credit) is Saturday, February 20, 2026, by noon.
9. The final deadline to withdraw from a course with no refund available is Saturday, February 20, 2026.
10. The last day to withdraw from the entire term is Thursday, March 13, 2026.
11. Graduate students must apply for graduation by Thursday, March 13, 2026.
12. The last day of classes for the Winter Term is Thursday, March 13, 2026.
13. Final examinations occur from Monday, March 16, 2026, to Friday, March 20, 2026.
14. The Winter Term ends on Friday, March 20, 2026.
15. Final grades become available online on Wednesday, March 25, 2026.

Oregon State Academic Calendar Spring 2026

1. Priority registration opens on Monday, February 23, 2026.
2. The Spring Term begins, and classes start on Sunday, March 30, 2026.
3. The last day to add a course online without department approval is Saturday, April 5, 2026.
4. The last day to drop a course for a 100% tuition refund is Saturday, April 5, 2026.
5. The deadline to audit a course runs from Sunday, April 6, 2026, to Thursday, April 10, 2026, by 5:00 p.m.
6. The last day to add a course online with department approval is Saturday, April 12, 2026.
7. The deadline to withdraw from a course with a 50% tuition refund is Saturday, April 19, 2026.
8. The last day to change the grading basis of a course (e.g., Credit/No Credit) is Friday, May 15, 2026, by noon.
9. The final deadline to withdraw from a course with no refund available is Friday, May 15, 2026.
10. The last day to withdraw from the entire term is Monday, June 5, 2026.
11. Graduate students must apply for graduation by Monday, June 5, 2026.
12. The last day of classes for the Spring Term is Monday, June 5, 2026.
13. Final examinations occur from Thursday, June 8, 2026, to Monday, June 12, 2026.
14. The Spring Term ends on Monday, June 12, 2026.
15. Final grades become available online on Thursday, June 17, 2026.

For more on the Oregon State Academic Calendar 2025-2026, visit the Oregon State University Calendar website.