Preliminary results of the 1950 Census of Housing were published in a series of reports, HC-1, HC-2, HC-3, HC-4, and HC-5. The data were based either on preliminary field counts or preliminary sample tabulations.

Series HC-4, are preliminary reports on selected housing characteristics, based on tabulations of samples of dwelling units. The HG-4 reports are for the 10 States with the largest population in 1940, and for Hawaii and Puerto Rico.