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The spectral analysis and data products in Data Release 16 (DR16; December2019) from the high-resolution near-infrared APOGEE-2/SDSS-IV survey aredescribed. Compared to the previous APOGEE data release (DR14; July 2017),APOGEE DR16 includes about 2 new stellar spectra, of which 1 are froma new southern APOGEE instrument mounted on the 2.5 m du Pont telescope at LasCampanas Observatory in Chile. DR16 includes all data taken up to August 2018,including data released in previous data releases. All of the data have beenre-reduced and re-analyzed using the latest pipelines, resulting in a total of473307 spectra of 437445 stars. Changes to the analysis methods for thisrelease include, but are not limited to, the use of MARCS model atmospheres forcalculation of the entire main grid of synthetic spectra used in the analysis,a new method for filling "holes" in the grids due to unconverged modelatmospheres, and a new scheme for continuum normalization. Abundances of theneutron capture element Ce are included for the first time. A new scheme forestimating uncertainties of the derived quantities using stars with multipleobservations has been applied, and calibrated values of surface gravities fordwarf stars are now supplied. Compared to DR14, the radial velocities derivedfor this release more closely match those in the Gaia DR2 data base, and aclear improvement in the spectral analysis of the coolest giants can be seen.The reduced spectra as well as the result of the analysis can be downloadedusing links provided in the SDSS DR16 web page.

APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South