1940 United States Census

The Sixteenth , conducted by the, determined the resident population of the to be 132,164,569, an increase of 7.3 percent over the 1930 population of 123,202,624 persons. The census date was,. A number of new questions were asked including where people were 5 years before, highest educational grade achieved, and information about wages. This census introduced sampling techniques; one in 20 people were asked additional questions on the census form. Other innovations included a field test of the census in 1939.