Groundwater resources are introduced as the most important and reliable source of water supply in arid and semi-arid regions. The risk of over-exploitation of these resources is a global threat that causes a phenomenon called land subsidence in many parts of the world, including Iran. Land subsidence is a morphological phenomenon that causes changes in the earth's surface. The purpose of this research is to investigate the subsidence of Mehran Plain, evaluate its extent, and compare it with the groundwater level decline in the region. For this purpose, data from SENTINEL-1 satellite and the InSAR method were used in SNAP software during the years 2018 to 2024 in October, and subsidence maps were drawn for each year in ArcMap. During this statistical period, a cumulative subsidence of 15 centimeters has occurred in the study area. In this research, in order to examine the groundwater level decline, three interpolation algorithms (IDW, Kriging, Spline) were used, and the lowest error coefficient was related to the IDW algorithm. Furthermore, the relationship between subsidence and groundwater level in the region was investigated, and its diagram was drawn. The groundwater level decline diagram was also drawn for October for all wells. An 86 percent groundwater level decline was calculated for the years 2017 to 2024.