Definitions and measures of asthma control used in clinical trials and practice often vary, as highlighted in the manuscript, “Is asthma control more than just an absence of symptoms? An expert consensus statement”. Furthermore, the authors discussed differences between patients and healthcare professionals (HCPs) in terms of understanding and managing asthma. Given these disparities, there is a need for consensus regarding what constitutes well-controlled asthma and, especially, how best it can be measured and recorded. This dataset describes and provides more detail on the methodology from a two-stage Delphi survey and a structured literature review, which were designed to reach a consensus definition of asthma control and alleviate misalignments between patients and HCPs.