The coronal magnetic field is the source of many of the interesting phenomena studied in heliophysics, but its high temperature, low density, large range of spatial scales of interest, and its highly dynamic nature make it quite difficult to measure. Efforts to measure, model, and predict the coronal magnetic field are critical to understanding and predicting conditions throughout the heliosphere. We invite submissions that describe recent efforts to characterize the coronal magnetic field through either models or observations, with a particular interest in works that use one to enhance or understand the other. We also invite submissions that describe the additional data and/or projects needed to advance our understanding of the coronal magnetic field.