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PEOPLE GROUP PROFILE

The Grass Koiari of Papua New Guinea

The Grass Koiari of Papua New Guinea, numbering approximately 3,800 people, are No Longer Unreached. They are an indigenous ethnic group of Papua New Guinea. They mostly adhere to Protestantism and Grass Koiari is their primary language.

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

Fast Facts:

Affinity Group: Pacific Islander Peoples
Country: Papua New Guinea
People Cluster: New Guinea
Primary Language(s): Grass Koiari (kbk)
Primary Religion(s): Protestantism
Population: 3,800
Strategic Progress Index (SPI): No Longer Unreached
Global Status of Evangelical Christianity (GSEC): 5% or Greater but Less than 10% Evangelical
People Group ID: PG020266
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Pray for the Grass Koiari 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: Protestantism
Religious Affiliation: Christianity

42%
%
Protestantism Adherents

Dig Deeper (Language):

Primary Language: Grass Koiari
Language Family: Koiarian

65%
%
Koiari Speakers

Media Resources in Grass Koiari:

Films:

No film resources are listed for this language.

Provided by the Jesus Film Project

View all resources

Bible Resources in Grass Koiari:

No Bible resources are listed for this language.

Provided by Faith Comes by Hearing

Or check out the Grass Koiari bible at Bible.com

Linked from YouVersion

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SPI: No longer Unreached

The Grass Koiari 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 Grass Koiari:
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 Grass Koiari of Papua New Guinea

How then will they call on him in whom they have not believed? And how are they to believe in him of whom they have never heard? And how are they to hear without someone preaching?
readRomans 10:14

Pray that those who haven't heard will hear the Word of Christ and believe in Him, calling upon the name of the Lord to be saved.

You adulterous people! Do you not know that friendship with the world is enmity with God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God.
readJames 4:4

Pray that the lost will be convicted of their friendship with the world, which is hostility toward God, and that they will turn from their sin and embrace the grace and mercy of God through Christ Jesus.

Oh, fear the LORD, you his saints, for those who fear him have no lack!
readPsalm 34:9

Pray that as people place their faith in Christ, they will be grounded in the Word, always trusting in the Lord's provision for their needs.

For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.
read2 Corinthians 5:21

Pray that Christians will cross cultures and share the hope of Christ, and that many will trust the One who took their sins and offers them His righteousness.

Grass Koiari Across Countries (ROP3 - 103473) reported in the following countries:

Strategic Progress Index
All

1 people group

PhotoPeople Group IDNameCountryPopulation ▼Strategic Progress IndexLanguageReligion
Grass KoiariPG020266Grass KoiariPapua New Guinea3,800No Longer UnreachedGrass KoiariProtestantism

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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