Puy Saint-Ambroise, Granite summit in Saint-Léon, France.

Puy Saint-Ambroise is a summit of 437 metres in the Allier department, at the northern end of the Monts de la Madeleine. It lies on the commune of Saint-Léon, about a kilometre east of the village. An orientation table stands at the top, and the site has been a classified landscape since 1995.

A small Benedictine priory dependent on Mozac Abbey was founded on the summit in the 11th century and lasted until the French Revolution. Sold as national property, it was turned into a farm and remains private property today.

The summit's orientation table names landmarks from the Morvan to the Chaîne des Puys, across seven departments. The site has been a protected landscape since 1995, and the summit also holds a natural camping area and a playground. The GR 3 long-distance trail passes just beside the top.

The summit is reached by car from the D21 road towards Liernolles, via two small roads turning off to the left, about one kilometre east of Saint-Léon. The GR 3 long-distance trail also passes right by the top. The site has a natural camping area and a playground.

The summit's orientation table names landmarks across seven departments, from the Morvan to the Chaîne des Puys. The puy forms the extreme northern end of the Monts de la Madeleine, and the whole site has been a protected landscape since 1995.