The Dearborn Survey is the result of a survey of faint red stars conducted at the Dearborn Observatory from about 1932 to 1947. It covers the declination range -4.5deg to +90deg (54% of the Sky), and consisted of over 1800 direct plates and spectrograms carrying single or multiple exposures varying from a second to 4 hours. The magnitudes in the catalog were obtained from direct plates mostly sensitive in the 0.55-0.64{mu}m wavelength region. The spectral types were obtained from objective-prism plates with red-sensitive emulsion, and were classified on the visibility of the TiO bands.