The tropospheric ozone assessment report, TOAR, aims to provide the research community with an up-to-date scientific assessment of tropospheric ozone’s global distribution and trends from the surface to the tropopause. With contributions from over 230 scientists and air quality specialists from 36 nations, the first assessment was published in the open-access, peer-reviewed literature in 2018. The second phase of TOAR commenced in 2020 and will produce a second assessment based on the peer-reviewed literature and new analyses by 2024. The TOAR Data Centre provides harmonized and documented data on ozone mixing ratios, exposure and dose metrics at thousands of measurement sites around the world. These data can be easily accessed and are free and open. It also operates the TOAR data portal, which provides links to quality assessed data sources of free tropospheric ozone from research organisations around the world. This presentation introduces the TOAR Data Infrastructure and provides the links to access TOAR data and its documentation.