Of the 148 million persons one year old and over in the United States in APril 1951, 117 million were living in same house as in April 1950, 31 million were living in a differnt house within the United States, and about one-third of a million had come in from outside continental United States, according to the results of a sample survey released today by Roy V. Peel, Director, Bureau of the Census, Department of Commerce. Of the 31 million mobile persons, that is, persons who had changed residence within the United States during the year, 21 million had moved within a county and 10 million were migrants, that is, they had moved from one county to another. About 4 million more persons had moved in the year ending in April 1951 than in either of the two preceding years. The April 1951 survey showed that about 21 percent of the total population one year old and over had moved as compared with 19 percent in the March 1950 and in the April 1949 surveys. Probably most of this increase in mobility is attributable to the Korean war and the current defense mobilization.