An infant school is a term used primarily in England and Wales, for the education of children between the ages of four and seven years. It is usually a small school serving a particular area. It is sometimes a department in a larger primary school educating children up to the age of approximately eleven years old.

An infant school forms part of local education provision giving primary education. In England and Wales, children start at infant school between the ages of four and five in a Reception class. They sometimes attend part-time (mornings only or afternoons only) for the first term.

In England, reception is considered part of early years education whilst the following two years are known as Key Stage 1. In Wales, the entirety of nursery and infant school is included in the foundation phase.

Infants is followed by Junior School known formally in both England and Wales as Key Stage 2.