A master station list containing information on the location of stations or observatories active in one or more of the disciplines of solar-terrestrial physics was compiled. The alphabetical listing includes the station coordinates, geomagnetic coordinates, conjugate geomagnetic coordinates, L-shell value, invariant latitude value, computed geocentric magnetic dip, and opening and closed dates for each of the observing stations. The vertical cutoff rigidity and station altitude are included for cosmic-ray stations. In addition to the alphabetical listing, a second listing of the master station list by geomagnetic latitude is included. Separate individual discipline listings are also presented.