Chiro Flanders (Dutch: Chirojeugd Vlaanderen) or simply Chiro, is a Belgian youth organisation, founded on Christian values, active in Flanders, Brussels and Eupen-Malmedy.

Chiro is a member of the umbrella of Catholic youth organizations Fimcap.

It was introduced by Jos Cleymans in an issue of Het Katholiek Patronaat, describing the youth of Chiro (Chirojeugd).

The Chiro movement emerged from meetings for children after the mass on Sunday called "patronates" teaching Catholic values.

At the same expressive practices like banners, songs and marches were introduced to make a common identity of the groups of the movement visible.