GeomeTRIC is an open-source geometry optimization program that takes input in form of Cartesian coordinates and executes external electronic structure codes through wrapper functions with file-based data-exchange to obtain energy and gradients. Translation-rotationinternal coordinates (TRIC), delocalized internal coordinates (DLC), hybrid delocalized internal coordinates (HDLC), and redundant internal coordinates are all implemented by Geo-meTRIC. The code supports optimizations with constraints and transition state searches.