This is the dataset of ALMA Large program ALMAGAL: ALMA Evolutionary study of High Mass Protocluster Formation in the Galaxy (PID: 2019.1.00195.L). ALMAGAL aims at observing 1mm continuum and lines toward more than 1000 dense clumps with M>500 M_sun and d < 7.5 kpc with similar linear resolution. The sample covers all evolutionary stages from IRDC to HII regions from the tip of the Bar to the outskirts of the Galaxy. The setup with 0.1 mJy sensitivity will enable a complete study of the clump-to-core fragmentation process down to at least 1000 AU and 0.3 M_sun Galaxy-wide, mapping the temperature and the local/global infall velocity patterns of the cores-hosting clumps. Data are organized into five categories: auxiliary (calibration tables, scripts, logs and quality assurance reports), product (FITS products for science targets and calibrators), raw (uncalibrated raw data used to make final products), raw semipass (flawed or incomplete uncalibrated raw data not used), and external (externally contributed data products). The main science data products include primary beam corrected aggregate interferometric continuum images (product/*_sci*cont*pbcor.fits), primary beam corrected continuum subtracted interferometric spectral line cubes (product/*_sci*cube*pbcor.fits), and single-dish images (product/*sd.im.fits). The qa directory provides quality reports, including QA2 data quality evaluation reports and instructions for calibrating the raw data (*.qa2_report.{pdf,html}) as well as data calibration and imaging diagnostic tables and plots (*.weblog.tgz). More description of additional data products can be found in the readme files.