This vector geospatial dataset contains bounding polygons that visualize the domain of archived groundwater flow models published by the Upper Midwest Water Science Center and attributes pertaining to the associated publication (citation, year of publication, authors, report ID, publication URL), model construction details, and a URL for publicly available model archives when available or a directory pathway for internal model archives. The index currently depicts 115 groundwater model domains across Michigan, Minnesota, and Wisconsin from publications dating back to 1985. Separately published groundwater transport models are not included in this dataset.