Developing this dataset was a part of a study on site response in vertical array sites of California. We compiled and processed a dataset of ground motion recordings from California vertical array sites. The data also includes shear-wave velocity profiles and geotechnical logs (if available) for the sites. The sites are owned by CSMIP and University of California Santa Barbara (UCSB). The data from vertical arrays help to evaluate observed site response between surface and downhole instruments. The direct observation of site response allows for validation studies on numerical and analytical site response models. This study was a part of Kioumars Afshari's PhD research under supervision of Prof. Jonathan P. Stewart in the Department of Civil Engineering at the University of California Los Angeles in 2017. A readme file included in this publication explains the data and how it is organized.