Oklahoma Kindergarten Age Cutoff — Plus Preschool & TK (2026–2027)
In Oklahoma, a child must turn 5 by September 1 to start kindergarten that fall. Oklahoma does not have a statewide Transitional Kindergarten grade; children go from preschool/pre-K to kindergarten. Oklahoma's public pre-K program, Oklahoma Early Childhood Four-Year-Old Program, is open to all 4-year-olds (age 4 by September 1; free, voluntary, open to all 4-year-olds (Oklahoma has offered universal pre-K since 1998)).
| Kindergarten cutoff | Turn 5 by September 1 |
|---|---|
| Transitional Kindergarten | Not offered statewide |
| Public pre-K | Oklahoma Early Childhood Four-Year-Old Program — universal (age 4) |
| Compulsory school age | 5 |
When can my child start? Personalize it
Enter your child's birth month and year — we don't ask for the exact day.
✓ You're set — we'll email you when it's time. You can also browse preschools near you.
Oklahoma age cutoffs — the details
Kindergarten and TK cutoffs are set by state law; preschool has no legal age cutoff because it is private. Cutoff verified from the official Oklahoma source. Always confirm the current date with your school or district — rules can change year to year.