Phillips, M. M.Contreras, CHsiao, E YMorrell, NBurns, Christopher RStritzinger, MAshall, C.Freedman, Wendy LHoeflich, P.Persson, S ELidman, ChrisSchmidt, Brian2022-03-080004-6280http://hdl.handle.net/1885/261904The Carnegie Supernova Project-II (CSP-II) was an NSF-funded, four-year program to obtain optical and near-infrared observations of a "Cosmology" sample of ~100 Type Ia supernovae located in the smooth Hubble flow (0.03 lesssim z lesssim 0.10). Light curves were also obtained of a "Physics" sample composed of 90 nearby Type Ia supernovae at z ≤ 0.04 selected for near-infrared spectroscopic timeseries observations. The primary emphasis of the CSP-II is to use the combination of optical and near-infrared photometry to achieve a distance precision of better than 5%. In this paper, details of the supernova sample, the observational strategy, and the characteristics of the photometric data are provided. In a companion paper, the near-infrared spectroscopy component of the project is presented.The work of the CSP-II has been generously supported by the National Science Foundation under grants AST-1008343, AST-1613426, AST-1613455, and AST-1613472. The CSP-II was also supported in part by the Danish Agency for Science and Technology and Innovation through a Sapere Aude Level 2 grant. M. Stritzinger acknowledges funding by a research grant (13261) from VILLUM FONDEN. T. D. is supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by Universities Space Research Association under contract with NASAapplication/pdfen-AU© 2018. The Astronomical Society of the Pacificcosmology: observationsgalaxies: distances and redshiftsstars: supernovae: general201910.1088/1538-3873/aae8bd2020-12-20