  The Sloan Digital Sky Survey IV (SDSS-IV) APOGEE-2 primary science goal was
to observe red giant stars throughout the Galaxy to study its dynamics,
morphology, and chemical evolution. The APOGEE instrument, a high-resolution
300 fiber H-band (1.55-1.71 micron) spectrograph, is also ideal to study other
stellar populations in the Galaxy, among which are a number of star forming
regions and young open clusters. We present the results of the determination of
six stellar properties ($T_{eff}$, $\log{g}$, [Fe/H], $L/L_\odot$, $M/M_\odot$,
and ages) for a sample that is composed of 3360 young stars, of sub-solar to
super-solar types, in sixteen Galactic star formation and young open cluster
regions. Those sources were selected by using a clustering method that removes
most of the field contamination. Samples were also refined by removing targets
affected by various systematic effects of the parameter determination. The
final samples are presented in a comprehensive catalog that includes all six
estimated parameters. This overview study also includes parameter spatial
distribution maps for all regions and Hertzprung-Russell ($L/L_\odot$ vs.
$T_{eff}$) diagrams. This study serves as a guide for detailed studies on
individual regions, and paves the way for the future studies on the global
properties of stars in the pre-main sequence phase of stellar evolution using
more robust samples.
