What are UPGs?
People Group is a group of individuals that have a common sense of history, language, beliefs, and identity.

Unreached People Groups (UPGs) are those People Groups who have not heard the Gospel of Jesus Christ. 
A group is considered unreached if less than 2% of population is evangelical Christian. There are too few true believers to evangelize and disciple the rest of the people group.

Did you know?

More than 3.3 billion people worldwide are still unreached.

Around 7 000 of 16 000 people groups globally are considered UPG.

95% of UPGs are located in the world between 10 degrees latitude and 40 degrees latitude stretching from North Africa to Southeast Asia.

Less than 3% of total cross-cultural missionary force is working in the 10/40 window.

Sources:
https://www.joshuaproject.net/
https://www.thetravelingteam.org/stats