The Ozark Plateau aquifer system stretches across approximately 70,000 square miles (mi2) of Arkansas, Missouri, Kansas and Oklahoma, and is composed of many hydrogeologic units, such as the Boone aquifer and the Roubidoux aquifer. However, this data release is focused on only 11,000 mi2 in northern Arkansas, southeastern Kansas, southwestern Missouri, and northeastern Oklahoma. The Boone aquifer covers approximately 10,700 mi2 of this area, and the Roubidoux aquifer covers the 11,000 mi2 area entirely. These aquifers are mostly made of Mississippian-aged and Ordovician-aged carbonate rock, and serve as the main sources of fresh groundwater in northeastern Oklahoma (Imes and Emmett, 1994). In 2017, the U.S. Geological Survey (USGS) and Oklahoma Water Resources Board (OWRB) began a hydrologic investigation to support a determination of maximum annual yields for the Boone and Roubidoux aquifers. This data release provides components of the hydrogeologic framework for that hydrologic investigation. To further characterize the hydrogeologic framework of the aquifers, contours and digital elevation models (DEMs) were created and modified on the following hydrogeologic units (listed from youngest to oldest): the Western Interior Plains confining unit, the Boone aquifer, the Ozark confining unit, and the Roubidoux aquifer. These contours and DEMs represent the altitudes of the bases of each hydrogeologic unit in feet. The hydrogeologic-unit names in this data release are consistent with those used in Oklahoma (Osborn, 2001; Czarnecki and others, 2009) and may differ from those used in regional reports describing the Ozark Plateaus aquifer system (Imes and Emmett, 1994; Westerman and others, 2016).