The invasive hemlock woolly adelgid insect (Adelges tsugae, HWA) threatens eastern hemlock trees (Tsuga canadensis) throughout eastern North America and is an increasing threat in Otsego County, NY. Different management strategies can mitigate the spread and effect of HWA, but landowners need information on the distribution and characteristics of hemlock stands to inform their decision-making process. We used field sampling of stand structure combined with remotely sensed data to a) map eastern hemlock in Otsego County and b) model stand structural characteristics of these stands. This information will be used to develop and disseminate site-specific recommendations on mitigation options to land owners. During the summer of 2022 we used point sampling (n= 5-10 per stand) to measure basal area and density of all tree species from 21 hemlock dominated stands distributed across the county. Stand basal areas were between 24 and 54 m2/ha with relative basal area of hemlock between 37 to 88%. The majority of the stands were west to north facing and were at elevations ranging from 362 m to 557m. Supervised classification was employed with the Semi-Automatic Classification Plugin in QGIS using Landsat imagery (Landsat 8-9 OLI/TIRS C2 L2, 11/03/22 and 07/03/22) on a training set of 81 plots. This classified the vegetation into categories of Cultivated Field, Hay Field, Deciduous Forest and Conifer Forest. The accuracy of classifying our 21 hemlock stands as conifers was 100%. With this data set, we were unable to separate hemlocks from stands of other conifer species, especially spruce (Picea sp.); additional remotely sensed data using a different sensor platform is needed. If hemlock stands can be separated from other conifers, we will estimate stand structure based on remotely sensed data. Multiple regression results showed that Landsat bands can be used to estimate hemlock relative basal area with 70% accuracy. Together a map of land cover classification and hemlock stand structural characteristics can inform land owner’s decisions on mitigation of hemlock woolly adelgid either by cultural controls, chemical controls and/or biological controls.