In order to study the impact of integration on the racial balance of Mississippi school districts, questionnaires were mailed to 147 District School Superintendents resulting in a 95 percent response rate. School enrollments by race for 1970 were furnished for 90 percent of the districts by the Department of Health, Education, and Welfare along with compliance status reports. The 1960 U.S. Census and other statistical publications were used. Some results are as follows. Only two of Mississippi's 150 school districts are not desegregated: these are all-black districts. Ninety-three percent of all public school pupils are attending desegregated schools. Eighty-nine percent of Negro pupils and 98 percent of white pupils are in racially integrated situations. While faculty integration is nearly complete, hiring practices favor the white teachers, and black administrators are being phased out. In almost every instance the ratio of white teachers to black is higher than the ratio of the student body: differences up to 40 percent have been found. While in 1964 there were only three non-sectarian private schools in operation, today there are 236 in operation. One hundred and sixty-three segregation academies are operating in 64 counties with an enrollment of 54,037. (Author/JM)