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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 described as an indigenous ethnic group of Papua New Guinea They are an Indigenous people, with Mamusi as their ethnic/kinship group and are in the New Guinea people cluster of the Pacific Islander Peoples. Their primary religion is Roman Catholicism. They primarily speak Mamusi.

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.

Pray Now!
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Dig Deeper (Religion):

Primary Religion: Roman Catholicism
Religious Affiliation: Christianity

82%
%
Roman Catholicism Adherents

Dig Deeper (Language):

Primary Language: Mamusi
Language Family: Austronesian

100%
%
Mamusi Speakers

Media Resources in Mamusi:

Films:

Provided by the Jesus Film Project

View all resources

Bible Resources in Mamusi:

Provided by Faith Comes by Hearing

Or check out the Mamusi 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: 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

But Jesus said, "Let the little children come to me and do not hinder them, for to such belongs the kingdom of heaven"
readMatthew 9:14

Pray that those who are spiritually dead will recognize their need for spiritual nourishment and turn to the One who offers true fulfillment.

For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.
readHebrews 4:12

Pray for God's Word to be accessible to everyone in this people group in a way they will resonate with so that many will engage with it, receive it, and share it with others.

For I am sure that neither death nor life, nor angels nor rulers, nor things present nor things to come, nor powers, nor height nor depth, nor anything else in all creation, will be able to separate us from the love of God in Christ Jesus our Lord.
readRomans 8:38-39

Pray that as people place their faith in Christ, they will have confidence in their salvation, knowing that nothing can separate them from the One who conquered death and loves them as His children.

Is it not to share your bread with the hungry and bring the homeless poor into your house; when you see the naked, to cover him, and not to hide yourself from your own flesh?
readIsaiah 58:7

As believers cross cultures to share the good news of Christ, pray that God will sustain them and grow their faith as He gives them the compassion necessary to minister well to those in need.

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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