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PEOPLE GROUP PROFILE

The Grass Koiari of Papua New Guinea

The Grass Koiari of Papua New Guinea, numbering approximately 3,700 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 Koiari and their primary religion is Protestantism.

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): Koiari (kbk)
Primary Religion(s): Protestantism
Population: 3,700
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

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Dig Deeper (Religion):

Primary Religion: Protestantism
Religious Affiliation: Christianity

42%
%
Protestantism Adherents

Dig Deeper (Language):

Primary Language: Koiari
Language Family: Koiarian

65%
%
Koiari Speakers

Media Resources in Koiari:

Films:

No entries found for: Koiari(kbk). Help build some!

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Bible Resources in Koiari:

Provided by Faith Comes by Hearing

Or check out the Koiari 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 Grass Koiari:
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 Grass Koiari 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 Grass Koiari:
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 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

And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their works were evil.
readJohn 3:19

Pray that God will have mercy on those who love the darkness they are walking in and turn from their sin to faith in Christ.

Jesus said to them, "I am the bread of life; whoever comes to me shall not hunger, and whoever believes in me shall never thirst."
readJohn 6:35

Pray that the lost will come to Jesus and believe in Him, never to hunger or thirst again.

But my righteous one shall live by faith, and if he shrinks back, my soul has no pleasure in him.
readHebrews 10:38

Pray that as people trust in Christ, they will live by faith and not shrink back from their hope in Christ.

For the needy shall not always be forgotten, and the hope of the poor shall not perish forever.
readPsalm 9:18

Pray that God will raise up believers who can help meet emotional and physical needs among this people group. Ask Him to open doors for them and give them the courage to walk into difficult situations and share the hope of the gospel boldly.

Grass Koiari Across Countries (ROP3 - 103473) 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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