The 10/40 window is an area of the globe in the Eastern hemisphere that contains 83% of the world’s unreached people groups. This area has the highest concentration of unsaved people and people groups.

Unreached people is a term used to describe people and people groups around the world who have little to no access to the Bible or the Gospel and have a small chance of ever hearing Jesus’ name. This can be due to many reasons including geographical, language, cultural, political, and situational barriers that make it difficult to reach these people whether physically, verbally, and/or spiritually.