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PEOPLE GROUP PROFILE

The Sepik Plains of Papua New Guinea

The Sepik Plains of Papua New Guinea, numbering approximately 6,100 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 Mevembet and their primary religion is Roman Catholicism.

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

Fast Facts:

Affinity Group: Pacific Islander Peoples
Country: Papua New Guinea
People Cluster: New Guinea
Primary Language(s): Mevembet (keh)
Primary Religion(s): Roman Catholicism
Population: 6,100
Strategic Progress Index (SPI): No Longer Unreached
Global Status of Evangelical Christianity (GSEC): 2% or Greater but Less than 5% Evangelical
People Group ID: PG010435
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Pray for the Sepik Plains 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: Mevembet
Language Family: Ndu

65%
%
Mevembet Speakers

Media Resources in Mevembet:

Films:

No entries found for: Mevembet(keh). Help build some!

Provided by the Jesus Film Project

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Bible Resources in Mevembet:

Provided by Faith Comes by Hearing

Or check out the Mevembet 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): 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 Sepik Plains:
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 Sepik Plains 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 Sepik Plains:
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 Sepik Plains 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 Sepik Plains:
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 Sepik Plains of Papua New Guinea

For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places.
readEphesians 6:12

Pray for those ensnared by the darkness of this world, that they will recognize the spiritual forces at work and turn to the light of Christ.

The LORD watches over the sojourners; he upholds the widow and the fatherless, but the way of the wicked he brings to ruin.
readPsalm 146:9

Pray for God to watch over people, wherever they are, and cause them to meet believers who will share the gospel with them clearly and lovingly.

Praise the LORD! I will give thanks to the LORD with my whole heart, in the company of the upright, in the congregation.
readPsalm 111:1

Pray that as people place their faith in Christ, they will praise the Lord with their whole heart in the assembly of the upright and in the congregation.

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. But I said to you that you have seen me and yet do not believe."
readJohn 6:35-36

Praise God for the things such as bread that He has provided as natural conversation bridges to the gospel. Pray that believers will use any bridges He provides to share the gospel with those who do not yet know the good news.

Sepik Plains Across Countries (ROP3 - 108853) 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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