Set by the district, since the entrance age itself is a local decision.
Early entrance is decided locally even where state law allows it, so ask your district office what evidence they expect and when the window closes.
Frequently asked
What's the New Hampshire kindergarten cutoff?
New Hampshire is the one state with no kindergarten entrance age in statute or regulation at all — the date is entirely a local district decision.
Who sets the kindergarten cutoff in New Hampshire?
New Hampshire leaves the entrance date to local school districts, so it can differ between two neighbouring towns. The rule lives in Not specified in New Hampshire statute or regulation.
Can a child start kindergarten early in New Hampshire?
Set by the district, since the entrance age itself is a local decision.
At what age is school required in New Hampshire?
In New Hampshire, school attendance is compulsory from age 6 to age 18. New Hampshire does not require kindergarten attendance; compulsory schooling starts at age 6.
Legal basis: Not specified in New Hampshire statute or regulation. Cutoff, early-entrance and compulsory-age details cross-checked against the Education Commission of the States 50-State Comparisons (K-3 policies and compulsory school age).
NH Dept. of Education — verify cutoff with your local school district before relying on this page for enrollment.