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 |
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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.
Preschools in Oklahoma
Kindergarten cutoffs in nearby states
Cutoff dates differ across the West South Central states — a birthday that misses the cutoff in one state can make it in another.