The Lithuanian Catholic Federation Ateitis (literally, 'future') is a youth organization in Lithuania uniting Catholic-minded schoolchildren, university students, and alumni.

[2] The aim of Ateitis is the integral development of young people enabling them to be effective apostles of Christ and creative agents capable of changing society according to Christian values.

[3] The motto of Ateitis is To Renew All Things in Christ (Latin: Omnia Instaurare in Christo, Lithuanian: Atkurti Viską Kristuje).

Due to the lengthy occupation, preserving the Lithuanian national heritage and culture has become a central element of the work and identity of Ateitis.

Ateitis is member of the international umbrella of Catholic youth organizations Fimcap since the General Assembly in Ghana in 2001.