The 10/40 Window Explained for Kids

The call to prayer comes through a tinny speaker mounted on a minaret in Dhaka, Bangladesh. It is 5:17 in the morning, still dark, and the sound floats over corrugated tin rooftops and through the open window of a small apartment where a boy named Rafiq is already awake. He is nine. He sits cross-legged on a woven jute mat, eating leftover rice with dal from a dented aluminum plate, the yellow lentils still warm because his mother heated them over a single gas burner before dawn. Outside, rickshaw bells begin to ring. The streets smell like diesel exhaust and fried puri dough. Rafiq has never met a Christian. Not once. Not his parents, not his teachers, not the man who sells jackfruit from a wooden cart at the end of his lane. The gospel has not reached his street.

Rafiq lives in the 10/40 Window.

If your family is learning about unreached people groups and why they matter, the 10/40 Window is one of the most important concepts you will encounter. It is not a window made of glass. It is a region of the world, a wide band of land stretching across North Africa, the Middle East, and Asia, where the majority of people who have never heard the good news of Jesus live.

The Numbers on the Map

Here is what the name means. Take a globe or a world map (a real one, if you have it, the kind you can spin or unfold on the kitchen table). Find the equator, that invisible line running around the middle of the earth at zero degrees latitude. Now move your finger north. Find the line at 10 degrees north latitude. Find the line at 40 degrees north latitude. The band of land between those two lines, stretching from the west coast of Africa all the way east to Japan, is the 10/40 Window.

The term was coined by a missions researcher named Luis Bush in 1990. He looked at the data, where the unreached people groups lived, where poverty was deepest, where access to the gospel was most limited, and he saw a pattern. It wasn’t random. The hardest-to-reach people on earth were clustered in this belt.

The numbers are staggering. Roughly two-thirds of the world’s population lives in the 10/40 Window. More than 80 percent of the world’s poorest people live here. And the vast majority of unreached people groups, communities with little or no access to the Christian faith, are concentrated in this region.

That is not a coincidence. It is a call.

What Countries Are in the 10/40 Window?

The list is long. It includes:

• North Africa: Morocco, Algeria, Libya, Tunisia, Egypt, Mauritania, Mali, Niger, Chad, Sudan
• The Middle East: Saudi Arabia, Iraq, Iran, Syria, Jordan, Yemen, Oman, UAE, Israel, Palestine, Lebanon, Turkey
• South Asia: India, Pakistan, Bangladesh, Nepal, Bhutan, Sri Lanka, Afghanistan
• Southeast Asia: Myanmar, Thailand, Laos, Cambodia, Vietnam
• East Asia: China, Mongolia, North Korea, South Korea, Japan, Taiwan

Some of these countries are completely closed to missionaries. Others allow limited religious freedom. A few have small but growing churches. But across the entire region, the common thread is this: most people have not heard the gospel in their heart language, the language they think in, dream in, argue in, and whisper to their children at bedtime.

The Major Religions of the 10/40 Window

One reason the 10/40 Window matters so much is that it contains the heartlands of the world’s major non-Christian religions. Understanding these faiths, with genuine respect for the people who hold them, helps us pray with wisdom and love.

Islam

More than 1.8 billion Muslims live around the world, and the 10/40 Window contains the historical and spiritual centers of Islam. Muslims follow the teachings of the Prophet Muhammad as recorded in the Quran. They practice five pillars: declaration of faith, daily prayer five times a day, charitable giving, fasting during the month of Ramadan, and pilgrimage to Mecca. Islam shapes every part of daily life for its followers, from what they eat (halal food prepared according to Islamic law) to how they greet one another (As-salamu alaykum, peace be upon you). Muslim communities are often deeply hospitable, generous, and devoted to their families and their faith.

Hinduism

India alone is home to over a billion Hindus. Hinduism is one of the oldest religious traditions on earth, with sacred texts, the Vedas, the Upanishads, the Bhagavad Gita, that stretch back thousands of years. Hindu worship involves colorful festivals like Diwali (the festival of lights, when clay oil lamps called diyas line windowsills and doorsteps) and Holi (when people throw bright powdered pigments at each other in the streets). Hindu temples are ornate and beautiful, filled with carved stone and the scent of sandalwood incense. The faith is deeply woven into Indian culture, art, music, and daily rhythms.

Buddhism

Buddhism originated in what is now Nepal and spread across East and Southeast Asia. Buddhists follow the teachings of Siddhartha Gautama, known as the Buddha, who taught a path toward ending suffering through ethical living, meditation, and wisdom. In countries like Thailand, Myanmar, and Cambodia, you will see monks in saffron-orange robes walking barefoot through morning streets, carrying alms bowls while families place offerings of sticky rice, fruit, and small cakes inside. Buddhist temples shimmer with gold leaf and the low hum of chanted prayers. The faith emphasizes compassion, mindfulness, and inner peace.

These are not “strange” religions practiced by “strange” people. They are deeply held beliefs carried by billions of real human beings, people who love their children, care for their elderly, celebrate holidays, mourn their dead, and search for meaning. God loves every single one of them. His great rescue plan includes them.

Why Haven’t They Heard?

This is the question kids ask most often, and it deserves an honest answer.

Some reasons are geographic. Many unreached people groups live in remote areas, mountain villages in Central Asia, desert communities in the Sahel, island clusters in Southeast Asia where the nearest town requires a six-hour boat ride over open water. Getting there is hard. Staying is harder.

Some reasons are political. Governments in countries like North Korea, Saudi Arabia, and Afghanistan restrict or outright ban Christian activity. Missionaries cannot enter legally, and local believers face severe consequences, imprisonment, violence, exile, for professing faith in Christ. The church in these places exists underground, in whispers, behind closed doors.

Some reasons are linguistic. There are over 7,000 languages spoken in the world. Many of the smallest ones have no written Bible, no translated Scripture, not even a single Gospel booklet in print. If you have never heard God’s Word in the language your mother used to sing you to sleep, the gospel can feel foreign in a way that has nothing to do with theology. Heart language matters.

And some reasons are historical. Centuries of colonialism, cultural conflict, and political upheaval have left deep wounds in many 10/40 Window regions. The association between Christianity and Western imperial power, whether fair or not, creates barriers that missionaries must navigate with humility, patience, and a willingness to listen before they speak.

None of these reasons are permanent. God is not blocked by borders, governments, languages, or history. But they help explain why the work is hard and why the workers are few.

Why the 10/40 Window Matters to God

Jesus told his disciples in Acts 1:8 that they would be his witnesses “in Jerusalem and in all Judea and Samaria, and to the end of the earth” (ESV). That last phrase, the ends of the earth, is not decoration. It is destination. God’s heart for the nations extends to every corner, every people, every language, every child eating rice from an aluminum plate before dawn in a city where the gospel has not yet arrived.

Revelation 7:9 paints a picture of the end of the story: “a great multitude that no one could number, from every nation, from all tribes and peoples and languages, standing before the throne and before the Lamb” (ESV). Every nation. Every tribe. That includes the Baloch shepherds of Pakistan. The Uyghur farmers of western China. The Fulani cattle herders of West Africa. The Khmer rice growers of Cambodia. None left out.

The 10/40 Window is not a hopeless place. It is an unfinished place. And the God who began that work is faithful to complete it. The biblical call to reach every nation runs from Abraham’s covenant through the Great Commission to the throne room of Revelation. Our guide to Great Commission Bible verses traces the whole arc.

A Family Activity: Pray Around the Window

Here is something your family can do this week. It takes a globe or a printed world map, a handful of sticky notes, and about fifteen minutes.

Step 1: Find the 10/40 Window on your map. Draw a light pencil line (or stretch a piece of yarn) along 10 degrees north and 40 degrees north latitude. Everything between those lines is the Window.

Step 2: Pick five countries inside the Window. Write each one on a sticky note and press it onto the map.

Step 3: For each country, look up one unreached people group that lives there. Joshua Project (joshuaproject.net) is the best tool for this, type in the country name and browse the list of unreached peoples. Write the people group’s name on the sticky note next to the country name.

Step 4: Each night for five nights, pray for one of those people groups at dinner or bedtime. Use their name. Pray that God would send workers to them. Pray that they would hear the gospel in their heart language. Pray for the children, kids just like yours, eating their breakfasts, going to school, playing in the streets, who have never heard the name of Jesus.

Step 5: Leave the map up. Let it stay on the wall or the table. Let your kids walk past it and see those names. Let the 10/40 Window become a real place in their imagination, not an abstract concept.

If your family enjoys hands-on prayer activities, our missions prayer cards for kids pair perfectly with this map exercise, each card features a specific unreached people group with prayer points written for children.

What Kids Can Do Right Now

Kids cannot change government policies. They cannot fund mission agencies. They cannot fly to closed countries.

But they can pray. They can learn a people group’s name. They can find Bangladesh on a map. They can ask, “What does it sound like there in the morning?” They can understand that the boy eating rice before dawn is a real person, with a real name, in a real place, loved by a real God, who simply has not heard the story yet.

And that kind of knowing changes the shape of a child’s prayers. It moves them from “God bless everybody” to “God, would you reach the Shaikh people of Bangladesh? Would you send someone to learn their language? Would you let them hear about Jesus in words that sound like home?”

For a deeper look at what makes a people group “unreached” and why that word matters, read our guide on what unreached people groups are and how to explain them to kids. And if your children are curious about the people who go to these places, our article on what a missionary is and what they do introduces the men and women who cross these barriers every day.

The 10/40 Window is not just a line on a map. It is the place where God’s great rescue plan is most urgently needed. And it is the place where the prayers of children, simple, specific, and stubbornly faithful, may matter most of all.

God sees every child in every city in that window. He has not forgotten a single one.