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PEOPLE GROUP PROFILE

The Tumbatu of Tanzania

The Tumbatu of Tanzania, numbering approximately 324,000 people, are Unengaged and Unreached. They are described as one of the subgroups of the Shirazi (108953) people of the island of Zanzibar, off the coast of northeastern Tanzania They are an Indigenous people, with Tumbatu as their ethnic/kinship group and are in the Bantu, Swahili people cluster of the Sub-Saharan African Peoples. Their primary religion is Sunni Islam. They primarily speak Swahili.

Photo by Google. (2026). Image generated by Gemini 3.1 Flash-Lite: Tumbatu

Fast Facts:

Affinity Group: Sub-Saharan African Peoples
Country: Tanzania
People Cluster: Bantu, Swahili
Primary Language(s): Swahili (swh)
Primary Religion(s): Sunni Islam
Population: 324,000
Strategic Progress Index (SPI): Unengaged and Unreached
Global Status of Evangelical Christianity (GSEC): Less than 2% Evangelical, No Recent CP Activity
People Group ID: PG050321
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Pray for the Tumbatu 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: Sunni Islam
Religious Affiliation: Islam

100%
%
Sunni Islam Adherents

Dig Deeper (Language):

Primary Language: Swahili
Language Family: Atlantic-Congo

100%
%
Swahili Speakers

Media Resources in Swahili:

Films:
TitleLink
JESUSView Film
JESUSView Film
MagdalenaView Film
The SaviorView Film

4 films

Provided by the Jesus Film Project

View all resources

Bible Resources in Swahili:

Bible Name (Translation)VideoAudioText
Habari Njema (Interconfessional)✓✓

1 entry

Provided by Faith Comes by Hearing

Or check out the Swahili 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 Tumbatu:
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 Tumbatu of Tanzania

For one will scarcely die for a righteous person—though perhaps for a good person one would dare even to die—but God shows his love for us in that while we were still sinners, Christ died for us.
readRomans 5:7-8

Pray for the many who don't yet understand the hope of the gospel, and pray that God will reveal to them that while they were in darkness, Christ died for them.

"You are the salt of the earth, but if the salt has lost its taste, how shall its saltiness be restored? It is no longer good for anything except to be thrown out and trampled under people's feet."
readMatthew 5:13

Pray that the lost will have the opportunity to hear a Christian witness of how the gospel can bring hope and that they will put their faith in Christ.

The LORD is my chosen portion and my cup; you hold my lot... indeed, I have a beautiful inheritance.
readPsalm 16:5-6

Pray that as people place their faith in Christ and face hardship, they will remember that God is their portion and cup and that He has a beautiful inheritance for them.

And Jesus answered him, “Blessed are you, Simon Bar-Jonah! For flesh and blood has not revealed this to you, but my Father who is in heaven."
readMatthew 16:17

Pray that God who is in heaven will place believers in the lives of people who need to encounter the gospel and that He will reveal to them the truth of what they hear.

Tumbatu Across Countries (ROP3 - 110271) reported in the following countries:

Strategic Progress Index
All

1 people group

PhotoPeople Group IDNameCountryPopulation ▼Strategic Progress IndexLanguageReligion
TumbatuPG050321TumbatuTanzania324,000Unengaged and UnreachedSwahiliSunni 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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