Marriage records were used to study the dynamics of the migration flow into the population of Kharkov in 1960-1993. The decrease in the migration rate was accompanied by changes in the ethnic composition of the migrants. The entire migration flow from the republics of the Baltic region consisted of Russians and Ukrainians. The increase in the migration flow from Transcaucasia was mainly accounted for by the migration activity of indigenous populations. Most migrants from Moldova, Central Asia, Kazakhstan, and Kyrgyzstan were also representatives of the respective indigenous populations. Malecot's coefficient of isolation by distance (b) decreased from 0.00123 to 0.0081.