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PEOPLE GROUP PROFILE

The Mamusi of Papua New Guinea

The Mamusi of Papua New Guinea, numbering approximately 11,000 people, are No Longer Unreached. They are an indigenous ethnic group of Papua New Guinea. They are an Indigenous people in the New Guinea people cluster of the Pacific Islander Peoples affinity bloc. Their primary language is Mamusi and their primary religion is Roman Catholicism.

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

Fast Facts:

Affinity Group: Pacific Islander Peoples
Country: Papua New Guinea
People Cluster: New Guinea
Primary Language(s): Mamusi (kdf)
Primary Religion(s): Roman Catholicism
Population: 11,000
Strategic Progress Index (SPI): No Longer Unreached
Global Status of Evangelical Christianity (GSEC): 5% or Greater but Less than 10% Evangelical
People Group ID: PG010172
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Pray for the Mamusi of Papua New Guinea

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: Roman Catholicism
Religious Affiliation: Christianity

82%
%

Dig Deeper (Language):

Primary Language: Mamusi
Language Family: Austronesian

100%
%

Media Resources in Mamusi:

Films:

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Provided by the Jesus Film Project

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Bible Resources in Mamusi:

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Provided by Faith Comes by Hearing

Or check out the Mamusi bible at Bible.com

Linked from YouVersion

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Explore Lostness and Next Steps

Unengaged and Unreached

Strategic Priority Index (SPI): Unengaged and Unreached (SPI: 2), 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): Moderately Reached People Group, (LPI: 5), 6% to 20% Evangelical.
Global Status of Evangelical Christianity (GSEC): 5% or Greater but Less than 10% Evangelical (GSEC: 5), this people group is greater than or equal to 5% evangelical

Next steps for the Mamusi:
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

SPI: Unreached yet Engaged

The Mamusi are Engaged yet Unreached, which means there are less than 2% evangelical Christian populations but there are sustained efforts at establishing self-sustaining churches consistent with evangelical faith and practice.

Next steps for the Mamusi:
Continue prayer and fasting for this group
Continue gospel seed sowing and church planting among this group
Begin training up local leaders to lead and develop strategies to reach their own people

SPI: No longer Unreached

The Mamusi are No Longer Unreached, which means there are more than 2% evangelical Christian populations and there are churches consistent with evangelical faith and practice. There is still more to be done among them.

Next steps for the Mamusi:
Empower local believers to begin praying for their own people
Continue gospel seed sowing and church planting
Encourage local leaders to being leading church planting strategy and looking for Unreached and Unengaged groups nearby

Pray specifically for the Mamusi of Papua New Guinea

While he was coming, the demon threw him to the ground and convulsed him. But Jesus rebuked the unclean spirit and healed the boy, and gave him back to his father.
readLuke 9:42

Pray that those who are living outside of the hope of the gospel will know and trust that Jesus offers freedom from the oppression of sin and hope in eternal life.

And when they saw it, they made known the saying that had been told them concerning this child.
readLuke 2:17

Pray that the lost will receive the good news of salvation in God's Son, have hearts eager to share it with others, and that all who hear will respond with wonder and faith!

You shall love the LORD your God with all your heart and with all your soul and with all your might.
readDeuteronomy 6:5

Pray that as people place their faith in Christ, they will love the Lord their God with all their heart, soul, and might, as they strive to live lives that honor and glorify Him.

After this I looked, and behold, 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, clothed in white robes, with palm branches in their hands, and crying out with a loud voice, “Salvation belongs to our God who sits on the throne, and to the Lamb!”
readRevelation 7:9-10

Pray that the promise in Revelation 7:9-10 will encourage believers from among them or from nearby people groups to share the gospel with people who have never learned it.

Mamusi Across Countries (ROP3 - 106202) reported in the following countries:

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 Definitions page.

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