The FIS Nordic Junior and U23 World Ski Championships 2019 took place in Lahti, Finland from 19 January to 27 January 2019. This was the 42nd Junior World Championships and the 14th Under-23 World Championships in nordic skiing.
This was the first championship where women compete in nordic combined. Ayane Miyazaki of Japan became the first female junior world champion by winning the normal hill/5 kilometre event on 23 January 2019.
All times are local (UTC+2).