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PEOPLE GROUP PROFILE

The Banyumasan of Indonesia

The Banyumasan of Indonesia, numbering approximately 9,200,000 people, are Engaged yet Unreached. They are described as an indigenous community of Indonesia; a dialect subgroup of Javanese (jav) and can also be known as Java Mendhoan, Java Banyumasan, Java Serayu. They are an Indigenous people, with Java / Jawa as their ethnic/kinship group and are in the Jawa people cluster of the Malay Peoples. Their primary religion is Sunni Islam. They primarily speak Javanese.

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

Fast Facts:

Affinity Group: Malay Peoples
Country: Indonesia
People Cluster: Jawa
Primary Language(s): Javanese (jav)
Primary Religion(s): Sunni Islam
Population: 9,200,000
Strategic Progress Index (SPI): Engaged yet Unreached
Global Status of Evangelical Christianity (GSEC): Less than 2% Evangelical, Dispersed CP Activity
People Group ID: PG022426
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Pray for the Banyumasan of Indonesia

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Dig Deeper (Religion):

Primary Religion: Sunni Islam
Religious Affiliation: Islam

100%
%
Sunni Islam Adherents

Dig Deeper (Language):

Primary Language: Javanese
Language Family: Austronesian

100%
%
Javanese Speakers

Media Resources in Javanese:

Films:

Provided by the Jesus Film Project

View all resources

Bible Resources in Javanese:

Provided by Faith Comes by Hearing

Or check out the Javanese 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: 1), 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): Expanding Unreached People Group, (LPI: 2), 0.5% to 2% Evangelical.
Global Status of Evangelical Christianity (GSEC): Less than 2% Evangelical, Dispersed CP Activity (GSEC: 3), this people group is less than 2% evangelical but there has been dispersed church planting among them within the past two years

Next steps for the Banyumasan:
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 Banyumasan 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 Banyumasan:
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 Banyumasan 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 Banyumasan:
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 Banyumasan of Indonesia

Jesus said to her, "Everyone who drinks of this water will be thirsty again, but whoever drinks of the water that I will give him will never be thirsty again. The water that I will give him will become in him a spring of water welling up to eternal life"
readJohn 4:13-14

Pray that those who don't know Jesus will drink of the living water that only Christ can provide and never thirst again.

Seek the LORD while he may be found; call upon him while he is near.
readIsaiah 55:6

Pray that the lost will seek the Lord while He may be found and call upon Him while He is near, for He is gracious and compassionate, slow to anger and abounding in steadfast love.

For the sake of Christ, then, I am content with weaknesses, insults, hardships, persecutions, and calamities. For when I am weak, then I am strong.
read2 Corinthians 12:10

Pray that as people place their faith in Christ, they will embrace their weaknesses, hardships, and difficulties, having hope because Christ's power is made perfect in their weakness.

Therefore, we are ambassadors for Christ, God making his appeal through us. We implore you on behalf of Christ, be reconciled to God.
read2 Corinthians 5:20

Pray that those God sends to cross cultures will be His ambassadors, faithfully imploring people on Christ's behalf to be reconciled to God through Jesus.

Java Banyumasan Across Countries (ROP3 - 104218) 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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