Population growth rates in the 1950-1975 period indicate that metropolitan and nonmetropolitan streams of migration are of virtually the same magnitude in Wisconsin; metropolitan residents are moving to nonmetropolitan places as frequently as their nonmetropolitan counterparts are migrating to metropolitan communities. When migration streams are decomposed by sex, age, rural-urban residence, employment status, education, occupation and income, other implications of shifts in population can be assessed. Sex ratios do not differ significantly, but young adults are more migratory than any other age group in the population. Migration to urban places peaks at ages 15 to 24 whereas migration to rural areas peaks later at ages 25-34. This pattern suggests that young migrants seeking jobs, education, and marriage partners prefer living in urban areas, while those older are more likely to choose a rural residence, perhaps because of perceived advantages in the rural life for raising children. Rural to urban migrants are closer to native urbanites in education, occupational skills, income and employability than to the rural residents they left. Using data from the U.S. census, this study examines the volume and composition of metropolitan and nonmetropolitan migration in Wisconsin. Tabular data is used to reflect study findings regarding the direction of the migration streams, interstate migrant status, and compositional characteristics of the migrant streams. (DS)