The note summarises data collected through an annual mapping of IASC country-level coordination structures 1 in place across 29 operations during the year 2021. It is the only standardized method for capturing coordination structures, capacities and alignment with IASC coordination requirements globally. An assessment of coordination performance and impact are outside the scope of this exercise; however, this data provides an important insight into the status and practice of humanitarian coordination at national and subnational levels.