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The Wasi of Tanzania

The Wasi of Tanzania, numbering approximately 65,000 people, are Unengaged and Unreached. They are a South Cushitic people known by the Swahili exonym Wasi, whose ancestors migrated from southwestern Ethiopia via Lake Turkana into Tanzania's Rift Valley around 2000 BC, predating Bantu settlement, and adopted Islam via nineteenth-century Swahili traders. They mostly adhere to Folk Islam and Alagwa is their primary language.

Photo by Google. (2026). Image generated by Gemini 2.5 Flash: Wasi

Fast Facts:

Affinity Group: Horn of Africa Peoples
Country: Tanzania
People Cluster: Rift
Primary Language(s): Alagwa (wbj)
Primary Religion(s): Folk Islam
Population: 65,000
Strategic Progress Index (SPI): Unengaged and Unreached
Global Status of Evangelical Christianity (GSEC): Less than 2% Evangelical, No Recent CP Activity
People Group ID: PG015060
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Pray for the Wasi of Tanzania

Join others around the world in praying for the lost to be saved, the gospel to advance, the global Church to grow, and for laborers to be sent out and sustained in the harvest.

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Dig Deeper (Religion):

Primary Religion: Folk Islam
Religious Affiliation: Islam

99%
%
Folk Islam Adherents

Dig Deeper (Language):

Primary Language: Alagwa
Language Family: Afro-Asiatic

58%
%
Alagwa Speakers

Media Resources in Alagwa:

Films:
TitleLink
JESUSView Film

1 film

Provided by the Jesus Film Project

View all resources

Bible Resources in Alagwa:

No Bible resources are listed for this language.

Provided by Faith Comes by Hearing

Or check out the Alagwa bible at Bible.com

Linked from YouVersion

View all resources

Explore Lostness and Next Steps

Unengaged and Unreached

Strategic Priority Index (SPI): Unengaged and Unreached (SPI: 0), which means there are less than 2% evangelical Christian populations among which there are no known efforts focused on establishing self-sustaining churches consistent with evangelical faith and practice.
Lostness Priority Index (LPI): Frontier Unreached People Group, (LPI: 0), < 0.1% Evangelical.
Global Status of Evangelical Christianity (GSEC): Less than 2% Evangelical, No Recent CP Activity (GSEC: 1), this people group is less than 2% evangelical, some evangelical resources are available, but there has been no active church planting among them within the past two years

Next steps for the Wasi:
Begin signifcant prayer and fasting for this group
Send cross-cultural teams to discover and research this people group
Begin gospel seed sowing and church planting among this group

Pray specifically for the Wasi of Tanzania

For my own sake, for my own sake, I do it, for how should my name be profaned? My glory I will not give to another.
readIsaiah 48:11

Pray that those who have been living for their own glory will turn to the One who is worthy of all praise and find their true identity in Him.

All the earth worships you and sings praises to you; they sing praises to your name.
readPsalm 66:4

Pray that the good news of Jesus will advance here and that many will bow down and sing praises to His name.

For this reason, when I could bear it no longer, I sent to learn about your faith, for fear that somehow the tempter had tempted you and our labor would be in vain.
read2 Thessalonians 3:5

Pray that as people place their faith in Christ, they will persevere according to God's command, walk in faith, and be strong so that they can resist the evil one’s deception.

And how are they to preach unless they are sent? As it is written, “How beautiful are the feet of those who preach the good news!”
readRomans 10:15

Pray that God will call many believers who will obediently go and share the gospel with those who desperately need it.

Alagwa Across Countries (ROP3 - 100210) reported in the following countries:

Strategic Progress Index
All

1 people group

PhotoPeople Group IDNameCountryPopulation ▼Strategic Progress IndexLanguageReligion
WasiPG015060WasiTanzania65,000Unengaged and UnreachedAlagwaFolk Islam

To download a comprehensive people group list in spreadsheet form, visit our Research Data page.

Peoplegroups.org relies on updates from the field and other organizations for much of our data, so if you have any updates, please contact us. We use various international naming standards. For a list of these standards and fields, visit our Data Standards section.

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