What Do Christian Missionaries Do

Where Are Christian Missionaries Needed Most?

When people ask, “Where are Christian missionaries needed most?” GFA World needs to be clear that missionaries are needed everywhere! God’s people all around the world are called to share their faith with others. Acts 1:8 says, “But you shall receive power when the Holy Spirit has come upon you; and you shall be witnesses to Me in Jerusalem, and in all Judea and Samaria, and to the end of the earth” (NKJV). That call still sends believers from their own communities to the ends of the earth.

So where are missionaries needed most? The answer begins with the great commission: every believer is sent to the people nearest and farthest from them. Yet the urgency is not evenly spread. The greatest need is where the message has not yet arrived, and that is where the church is smallest. Access matters as much as geography: who has heard the message, and who has not yet heard? The neediest places are the ones with the fewest workers and the smallest churches.

However, there are locations where many still have never heard the Good News. Much of GFA World’s ministry takes place in an area of the world known as the 10/40 window. Over 2.5 billion people living there have yet to hear the Good News.[1] They are waiting to experience the love of God. Because there are restrictions in many of these countries of who can travel freely and they are often closed to foreign missionaries, GFA’s missionaries serve inside this area. These faithful servants don’t have to learn a new language, become familiar with a new culture or adapt to the harsh living conditions to serve the people. They are already familiar with the areas in which they minister. National workers also pray with families and disciple new believers in their own language. The message travels through trusted voices, and the church grows where it is planted, gathering in homes until the day a meeting place is built.

Where are missionaries most needed? The answer follows the need: where the Gospel is least known. Across Africa and Asia, millions have never heard of Jesus, and no church exists within their own community to tell them. The need is not one country but a whole region of waiting hearts — from the cities of North Africa to the villages of South Asia — a vast harvest with few workers.

Every village reached becomes a sending place in its own turn, so the work multiplies beyond any single worker. The need is urgent, but it is not hopeless: the church that prays, gives and sends is the church that reaches the waiting world, one village at a time.

The waiting world is not a statistic; it is made of families, villages and names. Behind every unreached community stands a mother, a child, a neighbor waiting to hear — a face the church has not yet seen, a name God already knows.

What Is the 10/40 Window?

The 10/40 Window is the band of latitude from roughly 10 to 40 degrees north, sweeping across North Africa, the Middle East and much of Asia. Wikipedia’s overview of the 10/40 Window describes a region that contains the largest share of the world’s least-reached peoples.

For millions of unreached people, this region is home. GFA World’s 10/40 Window facts page explores what life looks like for families living there, from dense cities to isolated villages.

Since 1979, GFA World has been passionate about reaching people still waiting to hear the Good News and has trained national workers to serve in some of the neediest countries in the world. From water wells to literacy classes, they care for whole families. These workers minister to both the physical and spiritual needs of the people:


  • Physical – Meeting tangible needs is key to the effectiveness of our work. We provide items that help families break the cycle of poverty. For example, drilling a water well can provide clean water to an entire village, relieving women and children from the task of walking miles daily to find water. This frees up women for other work to provide for their families and enables children to go to school. We also supply income-generating gifts like farm animals and offer skills and literacy training, all of which help a family rise above poverty. Every gift is chosen with the family’s own needs in mind, and every family is served with dignity.

The two belong together. A well can change a village’s health, and a Bible study can change its hope. National workers care for both, because people are both body and spirit.

  • Spiritual – Did you know that around 80,000 people die every day in the 10/40 Window?[2] This gives GFA World strong motivation and passion to share the Good News with those living in this area. Through ministries of prayer and Bible study, pastors bring the Good News of Jesus to people here who have never heard of God’s incredible love for them. Prayer visits and home Bible studies keep the door of the Gospel open where churches are few.

Why national workers? Because they already belong to these communities. A local believer speaks the language, knows the customs and is trusted by neighbors before ever beginning ministry. No visa, no culture shock, no years of language school — only faithful presence.

The window takes its name from latitude, but its need is measured in people. Many of its nations rank among the least-reached on earth, and its cities are growing faster than the churches within them.

Restricted nations are not unreachable; they are reached by different messengers. National believers carry the Good News where visas cannot go, speaking the language of their own people and planting churches that last. The barrier is not distance but access, and access is what local believers already have.

A decade of service in one village can change three generations. That is why the need is measured not in miles but in messengers. The 10/40 Window also holds some of the world’s oldest civilizations and some of its youngest churches, planted in this generation.

The window is not a wall but a doorway: millions inside it are hearing the Gospel for the first time in this generation, because the church is being planted among them. Hope travels slowly in places without churches. A first believer, a first baptism, a first family gathering for worship — each step makes the next one possible, and the journey begins with one worker saying yes.

What Does It Mean to Be Unreached?

A community is considered unreached when it has little to no access to the Gospel and no church movement within its own people. Joshua Project, which tracks these communities worldwide, counts more than 7,100 unreached people groups — home to nearly 3.6 billion people. Under Joshua Project’s definition, a people group is unreached when less than 2 percent of its population is evangelical Christian and no more than 5 percent profess Christianity.

Missionaries measure the task in people groups rather than countries alone, because one nation may hold hundreds of distinct communities, each with its own language and customs. A group can be unreached even where a nearby city has many churches.

Reaching a people group usually takes more than one generation. The first believers plant seeds, the next generation waters them, and the one after that reaps the harvest. Faithfulness outlasts every obstacle, and every prayer, every visit and every translation matters. In most unreached communities, those who plant and water are national missionaries — believers from the region who remain for a lifetime.

The need is not spread evenly across the map. Some regions have many workers and many churches; others have almost none. The mission field is widest where the church is thinnest, and that is where the first believers are often the boldest. A single faithful family can become the seed of a whole congregation.

The Work That Reaches the Unreached

Church planting is often the first step in an unreached community. Planters do not simply start a service; they train local believers who can lead, teach and eventually plant more churches. GFA World supports this work through its ministries across Africa and Asia, where national workers serve their own people.

When believers meet physical needs with dignity, hearts often open to the Gospel for the first time. Clean water, a farm animal or a literacy class is often the doorway through which a family meets the love of Christ. Scripture in a heart language changes everything: when believers can read the Bible for themselves, the church grows roots that no outside worker can plant.

Bible translation is another essential work. As of 2025, only 544 of the world’s 7,396 living languages were still waiting for translation to begin, according to Wycliffe Global Alliance. About 37 million people are still waiting to hear God’s Word in the language they understand best.

Behind every worker, many more believers pray, give and send from home. Every step — whether a first trip or a monthly gift — joins the same mission. Believers who serve as local missionaries carry that mission into the communities they reach.

Many believers in the United States first step into missions through a short-term trip. The Traveling Team describes how short visits open eyes to the wider world of missions.[3] Such trips cannot enter restricted nations, but they can change a lifetime of praying and giving. About 6 in 10 American adults identify as Christian, Pew Research Center found, yet few ever serve abroad. Research on the global mission force points the same direction — Lausanne’s study of mission workers describes a growing emphasis on equipping indigenous ministers.

Sponsor a National Missionary

Missionaries are needed everywhere, but the greatest need remains where the Gospel has never been heard. National workers already live in these communities and can serve where outsiders cannot go. They do not arrive; they already belong, and they stay until the work is done.

Sponsorship equips a local believer to serve full time in their own community, trained and supported by GFA World. Monthly giving becomes a steady presence in villages the world rarely sees, and it keeps a worker on the field year after year.

You can help reach those still waiting. Your monthly gift supports a national worker who knows the language, understands the culture and brings the Gospel to people who have never heard it. Your partnership is the beginning of a church where none exists. Sponsor a national missionary today.

It only takes $45 a month to sponsor a national worker, who serves full time and brings hope that can only be found in Christ to villages needing it. Will you join us in this life-changing mission? GFA World’s national workers stand ready to serve wherever the need is greatest.

What do Christian missionaries do? Learn more about the faithful missionaries at GFA World

[1] “FAQs.” GFA World. Accessed April 7, 2025. https://www.gfa.org/about/faqs.
[2] “10/40 Window Statistics.” GFA World. Accessed August 5, 2026. https://gospelforasia.com/what-is-the-10-40-window/10-40-window-statistics/.
[3] “Ways to Go.” The Traveling Team. Accessed August 5, 2026. https://www.thetravelingteam.org/articles/ways-to-go.