Breton ("Brezhoneg") is an indigenous Celtic language spoken only in Brittany (a peninsula in western France). Nowadays most Breton speakers live in the western part of Brittany ("Breizh-Izel," also called 'Lower Brittany'). However, there are also speakers in the eastern part ("Breizh-Uhel," 'Upper Brittany'), especially in and around the main cities. Aspects that are addressed in this dossier include features of the education system, recent educational policies, main actors, legal arrangements and support structures, as well as quantitative aspects such as the number of schools, teachers, pupils, and financial investments. This information serves several purposes and are relevant for policymakers, researchers, teachers, students and journalists who wish to explore developments in minority language schooling in Europe. They can also serve as a first orientation towards further research, or function as a source of ideas for improving educational provisions in their own region. Every Regional Dossier begins with an introduction about the region concerned, followed by six sections that each deals with a specific level of the education system (e.g. primary education). Sections eight and nine cover the main lines of research into education of the concerned minority language, the prospects for the minority language in general and for education in particular. The tenth section gives a summary of statistics. Lists of regulations, publications and useful addresses concerning the minority language, are given at the end of the dossier. [This Regional dossier was originally compiled in 1998 by Olier ar Mogn. Meriadeg Vallerie and Catherine Bouroulleg updated the dossier in 2019. Unless otherwise stated academic data refer to the 2017/2018 school year.]