The POSYDON Data Release 2, corresponding to the binary population synthesis code POSYDON version 2.3.3. Refer to https://posydon.org/ for a detailed description, download scripts, and installation instructions. This dataset includes the downsampled single- and binary-star model grids (two single star grids and five binary star grids) along with their post-processed quantities and the trained classification and interpolation models, one tarball for each of our eight modeled metallicities (POSYDON_data_DR2_grids_XXX). The auxiliary data file (POSYDON_data_auxiliary.tar.gz) contains ancillary data to aid in post-processing grids and generating binary populations, including pre-loaded supernova prescriptions, star-formation histories, and gravitational wave sensitivities. We additionally provide our randomly sampled validation (POSYDON_validation_DR2_grids_XXX) and test (POSYDON_test_DR2_grids_XXX) binary star model grids for each of our metallicities that were used to train grid interpolator objects. Note: this version of the data set (v2.3.3) contains a corrected IllustrisTNG100-1 auxiliary data file. Previous versions assumed an incorrect box volume of $\rm 100\ Mpc^3$ when it should have been $\rm 110.7\ Mpc^3$. This corrected file is stored in POSYDON_data_auxiliary.tar.gz and may be downloaded separately manually here, or via CLI with the command $\texttt{get-posydon-data auxiliary}$.