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The Tumbatu of Tanzania

The Tumbatu of Tanzania, numbering approximately 325,000 people, are Unengaged and Unreached. They are one of the subgroups of the Shirazi (108953) people of the island of Zanzibar, off the coast of northeastern Tanzania. They mostly adhere to Sunni Islam and Swahili (individual language) is their primary language.

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 (individual language) (swh)
Primary Religion(s): Sunni Islam
Population: 325,000
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

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Dig Deeper (Religion):

Primary Religion: Sunni Islam
Religious Affiliation: Islam

100%
%
Sunni Islam Adherents

Dig Deeper (Language):

Primary Language: Swahili (individual language)
Language Family: Atlantic-Congo

100%
%
Swahili Speakers

Media Resources in Swahili (individual language):

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 (individual language):

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

1 entry

Provided by Faith Comes by Hearing

Or check out the Swahili (individual language) 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

But those who desire to be rich fall into temptation, into a snare, into many senseless and harmful desires that plunge people into ruin and destruction.
read1 Timothy 6:9

Pray for those, rich and poor, who have put their trust in worldly things, and ask that they will be honest with themselves, acknowledge their need for God and turn to Him.

How beautiful upon the mountains are the feet of him who brings good news, who publishes peace, who brings good news of happiness, who publishes salvation, who says to Zion, "Your God reigns."
readIsaiah 52:7

Pray that those who don't know the good news of peace and salvation through Jesus Christ will have an opportunity to receive it. Pray that it will bring hope and healing to their souls.

But when the goodness and loving kindness of God our Savior appeared, he saved us, not because of works done by us in righteousness, but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit.
readTitus 3:4-5

Pray that as people place their faith in Christ and might struggle with temptation to trust in their own works, they will remember that it is only because of God's mercy that they have been saved.

For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places.
readEphesians 6:12

Ask God to give those He sends to cross cultures the discernment they need to recognize the spiritual battle they are fighting. Pray God will protect their faith as they abide in Him.

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

Strategic Progress Index
All

1 people group

PhotoPeople Group ID ▼NameCountryPopulationStrategic Progress IndexLanguageReligion
TumbatuPG050321TumbatuTanzania325,000Unengaged and UnreachedSwahili (individual language)Sunni 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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