The Yogyakarta-Sleman Groundwater Basin has an important role in providing water resources for people of Sleman Regency, Yogyakarta City, and Bantul Regency. If it is not managed properly, excessive groundwater utilization can reduce the quality and quantity of groundwater. This study aims to determine the level of groundwater utilization in the Yogyakarta-Sleman Groundwater Basin. The method used is the calculation of dynamic groundwater and water utilization according to the Indonesian National Standard (SNI) number 19-6728.1-2002. The results showed that the trend of total groundwater utilization from 2013 to 2018 has increased in Sleman Regency, Yogyakarta City, and Bantul Regency. However, when viewed from the level of groundwater utilization, Sleman Regency, Yogyakarta City, and Bantul Regency are dominated by low utilization rates, while the very high utilization rates in Sleman Regency are in Godean and Gamping Districts. The utilization rate is very high in the city of Yogyakarta, located in Umbulharjo District. While the level of utilization is very high in Bantul Regency, in Imogiri District. Thus it can be concluded that the level of groundwater utilization in the Yogyakarta-Sleman Groundwater Basin area is quite diverse, dominated by the low category but there are several sub-districts in the very high category, so that the groundwater utilization zone in CAT Yogyakarta-Sleman still needs control, so that it can be sustainable and utilized in the long term. Keywords: groundwater basin, groundwater use, index of groundwater use