Enrollment Dates -
Summer and Fall 2021
| Dates to Register | Overall Earned Hours | |
| March | 22 | Priority and Graduate Students |
| Seniors | ||
| 23 | 115 or more | |
| 24 | 110 or more | |
| 25 | 105 or more | |
| 26 | 100 or more | |
| 29 | 90 or more | |
| Juniors | ||
| March | 30 | 85 or more |
| 31 | 80 or more | |
| April | 1 | 75 or more |
| 2 | 70 or more | |
| 5 | 65 or more | |
| 6 | 60 or more | |
| Sophomores | ||
| April | 7 | 50 or more |
| 8 | Tulsa Transfer Enrollment Day 50+ hours (Tulsa only) | |
| 12 | Transfer Enrollment Day 50+ hours* | |
| 13 | 40 or more | |
| 14 | 30 or more | |
| Freshmen | ||
| April | 15 | 20 or more |
| 16 | Transfer Enrollment Day 20+ hours* | |
| 19 | 15 or more | |
| 20 | 10 or more | |
| 21 | Open for all continuing students | |
| 23 | All transfers* | |
| May | 6 | All transfers* |
*New freshmen and new transfer students will begin the enrollment process with the New Student Orientation and Enrollment Office, 321 Student Union, (405) 744-3636, newstudents.okstate.edu.