Of the 16,791 people groups by country, 7,275 are still considered unreached. Of these 7,275 groups, 6,202 are in 10/40 Window countries. That means 85% of all unreached people groups are in the 10/40 Window.Of the 7,275 Unreached people groups, about 3,600 (49%) are small groups under 10,000 in population (or population unknown). Of the remaining 3,675 unreached groups, about 1,424 are under 50,000 in population. That leaves 2,251 Unreached groups 50,000 and over in population. A vibrant church in a large group may take the gospel to a number of smaller satellite people groups that have ethnic similarities.
Statistics of People Group Religions3,374 groups are primarily Muslim, totaling nearly 1,476,000,000 individuals.2,684 groups are primarily Hindu, totaling about 987,000,000 individuals.577 groups are primarily Buddhist, totaling nearly 619,000,000 individuals.