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PEOPLE GROUP PROFILE

The Siar of Papua New Guinea

The Siar of Papua New Guinea, numbering approximately 4,600 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 Siar-Lak and their primary religion is Roman Catholicism.

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

Fast Facts:

Affinity Group: Pacific Islander Peoples
Country: Papua New Guinea
People Cluster: New Guinea
Primary Language(s): Siar-Lak (sjr)
Primary Religion(s): Roman Catholicism
Population: 4,600
Strategic Progress Index (SPI): No Longer Unreached
Global Status of Evangelical Christianity (GSEC): 2% or Greater but Less than 5% Evangelical
People Group ID: PG010444
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Pray for the Siar 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

78%
%
Roman Catholicism Adherents

Dig Deeper (Language):

Primary Language: Siar-Lak
Language Family: Austronesian

100%
%
Siar-Lak Speakers

Media Resources in Siar-Lak:

Films:

Provided by the Jesus Film Project

View all resources

Bible Resources in Siar-Lak:

Provided by Faith Comes by Hearing

Or check out the Siar-Lak 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): Marginally Reached People Group, (LPI: 4), 3% or Greater but Less than 6% Evangelical.
Global Status of Evangelical Christianity (GSEC): 2% or Greater but Less than 5% Evangelical (GSEC: 4), this people group is greater than or equal to 2% evangelical

Next steps for the Siar:
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 Siar 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 Siar:
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 Siar 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 Siar:
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 Siar of Papua New Guinea

The grass withers, the flower fades, but the word of our God will stand forever.
readIsaiah 40:8

Pray that those who don't know Jesus will be freed from the emptiness of fading hopes and find lasting life and truth in the unchanging Word of God.

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 the gospel will advance among those who don’t know the good news of salvation in Jesus so that they might believe and trust in Jesus.

And if I go and prepare a place for you, I will come again and will take you to myself, that where I am you may be also.
readJohn 14:3

Pray that as people place their faith in Christ, they will have hope in trials because they know that Jesus will one day take them to be with Him forever.

So then it depends not on human will or exertion, but on God who has mercy.
readRomans 9:16

Ask God to raise up people who will trust in His sovereignty as they share the gospel, knowing that it depends not on human will or exertion, but on God who has mercy.

Siar Across Countries (ROP3 - 108982) 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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