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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

View all resources

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

I will put enmity between you and the woman, and between your offspring and her offspring; he shall bruise your head, and you shall bruise his heel.
readGenesis 3:15

Pray that those without Christ will hear the words of Genesis 1-3 in their own language, and desire to know their Creator and His provision of salvation.

This is the message we have heard from him and proclaim to you, that God is light, and in him is no darkness at all.
read1 John 1:5

As mobile phones, radio, and satellite television, and other technologies become more available worldwide, pray for people who are developing digital gospel resources so that others can easily access the gospel.

And they all ate and were satisfied. And what was left over was picked up, twelve baskets of broken pieces.
readLuke 9:17

Pray that as people place their faith in Christ, they will meditate on the stories of Jesus' miracles, be in awe of Him, and trust Him for everything they need.

Wash me thoroughly from my iniquity, and cleanse me from my sin!
readPsalm 51:2

Pray that God will raise up believers to go and share the gospel with those in this people group who need to be washed of their iniquity and cleansed from their sins.

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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