Lasallian educational institutions are educational institutions affiliated with the De La Salle Brothers, a Catholic religious teaching order founded by French priest Saint Jean-Baptiste de La Salle, who was canonized in 1900 and proclaimed by Pope Pius XII as patron saint of all teachers of youth on May 15, 1950. In regard to their educational activities the Brothers have since 1680 also called themselves "Brothers of the Christian Schools", associated with the Institute of the Brothers of the Christian Schools; they are often referred to by themselves and others by the shorter term "Christian Brothers", a name also applied to the unrelated Congregation of Christian Brothers or Irish Christian Brothers, also providers of education, which commonly causes confusion.

The De La Salle Brothers, officially named the Institute of the Brothers of the Christian Schools abbreviated FSC, is a Catholic lay religious congregation of pontifical right for men founded in France by Jean-Baptiste de La Salle (1651–1719), and now based in Rome, Italy. The De La Salle Brothers are also known as the Christian Brothers, French Christian Brothers, or Lasallian Brothers. The Lasallian Christian Brothers are distinct from the Congregation of Christian Brothers, often also referred to as simply the Christian Brothers, or Irish Christian Brothers. The Lasallian Brothers use the post-nominal abbreviation FSC to denote their membership of the order, and the honorific title Brother, abbreviated "Br."