The 10/40 Window is an area of the world that contains the largest population of non-Christians in the world.  The area extends from 10 degrees to 40 degrees north of the equator, and stretches from North Africa across to China.

The 10/40 Window contains:

• roughly 2/3 of the world's population (more than 4.4 billion people)
• nations most resistant to the gospel of Jesus Christ
• the least evangelised peoples in the world (97% of the least evangelised nations)
• little access to Christian resources
• the hub of the major non-Christian religions - Islam, Hinduism, Buddhism, Animism, and Communism
• the poorest of the poor (82% of the poorest of the world's poor, 84% of those with lowest quality of life)
• the least Christian resource investment and least sharing of the gospel!