What Grade Is My Kid 2025–26

Per-age guide · 15 years old · 2025–26

What grade is a 15-year-old in?

A typical 15-year-old in the United States is in 10th grade for the 2025–26 school year — if they were born before their state's kindergarten cutoff. If they were born after, they're typically one grade behind: 9th grade.

Quick answer

The cohort split, visualized

The cohort split

How a single year of birthdays becomes two grades.

Every state draws a line on the calendar. Children born before the September 1 cutoff start school a year ahead of children born after.

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
September 1 cutoff
Born before cutoff10th gradeStarted K on schedule. Now age 15.
Born after cutoff9th gradeStarted K a year later. Same age, one grade behind.

Calculate for your child

↓ Tap Calculate to see the grade
Most US states use a September 1 cutoff. Year-stamped for the 2025–26 school year.

15-year-olds by state — 2025–26

The same 15-year-old lands in different grades depending on which state they live in. Sortable.

Grade for a 15-year-old by state — 2025–26
StateCutoffTypical gradeNotes
AlabamaSeptember 110th gradeChildren must turn 5 by September 1.
AlaskaSeptember 110th gradeChildren must turn 5 by September 1.
ArizonaAugust 3110th gradeChildren must turn 5 on or before August 31.
ArkansasAugust 110th gradeChildren must turn 5 by August 1.
CaliforniaSeptember 110th gradeChildren must turn 5 by September 1.
Coloradovaries10th gradeCutoff is set by individual school districts. Most use August or September.
ConnecticutJanuary 110th gradeChildren must turn 5 by January 1 of the school year (Jan 1 falls mid-year).
DelawareAugust 3110th gradeChildren must turn 5 by August 31.
District of ColumbiaSeptember 3010th gradeChildren must turn 5 by September 30.
FloridaSeptember 110th gradeChildren must turn 5 by September 1.
GeorgiaSeptember 110th gradeChildren must turn 5 by September 1.
HawaiiJuly 3110th gradeChildren must turn 5 by July 31.
IdahoSeptember 110th gradeChildren must turn 5 by September 1.
IllinoisSeptember 110th gradeChildren must turn 5 by September 1.
IndianaAugust 110th gradeChildren must turn 5 by August 1.
IowaSeptember 1510th gradeChildren must turn 5 by September 15.
KansasAugust 3110th gradeChildren must turn 5 by August 31.
KentuckyAugust 110th gradeChildren must turn 5 by August 1 (some districts use earlier dates).
LouisianaSeptember 3010th gradeChildren must turn 5 by September 30.
MaineOctober 1510th gradeChildren must turn 5 by October 15.
MarylandSeptember 110th gradeChildren must turn 5 by September 1.
Massachusettsvaries10th gradeCutoff is set by individual school districts (LEA decision).
MichiganSeptember 110th gradeChildren must turn 5 by September 1.
MinnesotaSeptember 110th gradeChildren must turn 5 by September 1.
MississippiSeptember 110th gradeChildren must turn 5 by September 1.
MissouriAugust 110th gradeChildren must turn 5 by August 1.
MontanaSeptember 1010th gradeChildren must turn 5 by September 10.
NebraskaSeptember 3010th gradeChildren must turn 5 by September 30.
NevadaSeptember 3010th gradeChildren must turn 5 by September 30.
New Hampshirevaries10th gradeNew Hampshire defers kindergarten age requirements to local school districts.
New Jerseyvaries10th gradeNew Jersey defers kindergarten age requirements to local school districts (most use October 1).
New MexicoSeptember 110th gradeChildren must turn 5 by September 1.
New YorkDecember 110th gradeDecember 1 statewide minimum; districts may set earlier dates.
North CarolinaAugust 3110th gradeChildren must turn 5 by August 31.
North DakotaJuly 3110th gradeChildren must turn 5 by July 31.
OhioAugust 110th gradeChildren must turn 5 by August 1.
OklahomaSeptember 110th gradeChildren must turn 5 by September 1.
OregonSeptember 110th gradeChildren must turn 5 by September 1.
Pennsylvaniavaries10th gradePennsylvania defers kindergarten age requirements to local school districts (most use September 1).
Rhode IslandSeptember 110th gradeChildren must turn 5 by September 1.
South CarolinaSeptember 110th gradeChildren must turn 5 by September 1.
South DakotaSeptember 110th gradeChildren must turn 5 by September 1.
TennesseeAugust 1510th gradeChildren must turn 5 by August 15.
TexasSeptember 110th gradeChildren must be 5 on or before September 1.
UtahSeptember 110th gradeChildren must turn 5 by September 1.
Vermontvaries10th gradeVermont defers kindergarten age requirements to local school districts.
VirginiaSeptember 3010th gradeChildren must turn 5 by September 30.
WashingtonAugust 3110th gradeChildren must turn 5 by August 31.
West VirginiaAugust 3110th gradeChildren must turn 5 by August 31.
WisconsinSeptember 110th gradeChildren must turn 5 by September 1.
WyomingSeptember 1510th gradeChildren must turn 5 by September 15.

Frequently asked

Can a 15-year-old skip a grade?
Grade-skipping is possible but rare; most US districts require formal academic assessment plus a social-emotional review. Talk to the school counselor before assuming.
What if my 15-year-old started kindergarten late?
If they were redshirted (held back a year before K), they'll be one grade behind their birth-year cohort. That's the second row of the answer above.
Is my 15-year-old considered "redshirted"?
Only if you intentionally delayed kindergarten. Children born after the cutoff who start K on schedule for their birthday aren't redshirted — they're on time for their state.

Sources

Education Commission of the States — Kindergarten Entrance Ages.
Individual state Departments of Education (linked from each state page).