US Peace Index

The United States Peace Index (USPI) measures the level of peacefulness in all 50 US states over the last 20 years.

The USPI aims to prove a more localised view of peace within the U.S. and to determine what conditions are associated with peace at the state level.

The USPI uses the same definition of peace as the Global Peace Index (GPI) whereby peace is ‘the absence of violence or the fear of violence’.


The USPI is comprised of five indicators, which are a subset of the 22 indicators used in the Global Peace Index (GPI). These five indicators were chosen because they best capture peace at the state level and also because similar data is available in other countries, allowing for a consistent framework to be applied to other national level peace indices.

The USPI uses the following five indicators to measure peace at the state level:

All indicators are scored between 1 and 5, with 1 being the most peaceful and 5 the least.

Each indicator is assigned a weight, based on the GPI weighting system, which reflects the relative importance of the indicator. Homicides and violent crime are given a weight of 4, incarceration and police employees 3, and as small arms is a proxy indicator, it is assigned a weight of 1.

The USPI report provides an analysis of the socio-economic measures that are associated with peace, as well as estimates of the cost of violence and the economic benefits that would flow from increased levels of peace.

Institute for Economics and Peace

The USPI is produced by the Institute for Economics and Peace, the brains behind Vision of Humanity. For more detailed information about the methodology and findings of the USPI, download the USPI Report. For any further questions or data requests, please contact us through the ‘Contact’ section of this website.

Index list:

Contact us

Vision of Humanity is an initiative of the Institute for Economics and Peace (IEP). IEP have offices in New York and Sydney. For more specific inquiries related to the peace indexes and research, please contact IEP directly.

Data request:

Sydney office

PO Box 42, St Leonards,
NSW 1590,
Tel: +61 2 9901 8500

New York office

3 East 54th Street
14th Floor
New York, New York 10022
Tel: +1 (646) 963-2160

Job opportunities and internships are listed on the Institute for Economics and Peace website. See them.

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