The Global Slavery Index

Measuring the extent and risk of modern slavery and the effectiveness of our global efforts to end it.

Next publication release, 2022

Photo Credit: Anna Pogossova. Walk Free.

Why we measure modern slavery

You can’t solve a problem if you can’t measure it. Knowing how and where modern slavery occurs is key to eradicating it. By compiling data about slavery’s prevalence and geographical variation, the Global Slavery Index provides an important starting point for governments, firms, NGOs, faith communities and individuals to act.

The Global Slavery Index presents a thoroughly researched, detailed picture of modern slavery as it exists across industries and countries today. It also indicates the actions governments are taking to combat modern slavery and the risks that populations face around the world.

How we do it

Walk Free uses cutting-edge prevalence estimation techniques including nationally-representative surveys in partnership with Gallup, risk-model extrapolation and multiple systems estimation to measure modern slavery globally. We also assess government responses to this issue and vulnerability structures that impact populations around the world.

Our targets

  • Provide the most comprehensive data on global modern slavery at a country level.
  • Continue to refine our methodology to provide the most accurate modern slavery prevalence, risk and government response data.
  • Use our measurement as a foundational resource for effective advocacy work.
  • Hold governments accountable for their anti-slavery actions.
  • Continuously improve our evidence base to close gaps in the measurement of modern slavery globally.
  • Become the benchmark measure for assessment of progress towards the relevant SDG targets.

34 reports

Modern slavery reports created since 2011

4th edition

Published four editions of the Global Slavery Index

9+ years

Over 9 years of fighting to reduce labour exploitation

The Global Slavery Index

Note: We are currently gathering data for our next targeted release in 2022. Our most recent full report release was in 2018.

Use our data to inform action against modern slavery.

Visit the Global Slavery Index website.

Related resources

Pervasive, Punitive, and Predetermined: Understanding Modern Slavery in North Korea
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