Most children start formal school around age 5 , but the exact starting age depends on the country and sometimes the state or district.

Typical starting ages by country

  • United States:
    Kids usually enter kindergarten at age 5 , typically the year they turn 5 by a cutoff date (often August 31 or September 1, depending on the state).

School is compulsory from about age 6–7 , depending on the state, but many states allow kids to start as early as 5.

  • United Kingdom:
    Children reach compulsory school age the term after their 5th birthday (so usually starting a term when they are 4, and turning 5 during that term).

Many families also choose to send kids to nursery or reception classes from age 3–4 as optional early education.

  • Australia and Canada:
    Children usually start formal primary school around age 5–6 , with some areas offering preparatory or “prep” years at 5 and full primary from 6.
  • Other countries:
    • Finland: Formal primary school starts at age 7 , though high‑quality pre‑primary is widely available from age 6.
* **France and parts of Europe:** Many children enter **pre‑primary or école maternelle from about age 3** , then transition to compulsory primary school around **age 6**.

Quick age‑by‑grade snapshot (US‑style system)

This is a common age–grade pattern in many countries using a US‑style system:

School level Typical age Common grade
Kindergarten / Pre‑primary 5–6 K / Reception
Elementary / Primary 6–10 1st–5th grade
Middle / Junior high 11–13 6th–8th grade
High / Secondary 14–18 9th–12th grade

Why there’s so much variation

  • Cut‑off dates: Many places set a “birthday by” date (e.g., “must turn 5 before August 31”) that determines which school year a child joins.
  • Early‑years choice: Preschool or nursery (often ages 3–4) is usually optional; compulsory full‑time schooling starts later, around 5–7 depending on the country.

If you tell me your country or state, I can give you a more precise “what age do kids go to school” answer for your local system.