This article compares the main findings of Brazilian agricultural census data of 1996 with the same of 2006 by applying the methodology known as ‘FAO/INCRA’ (Food Agriculture Organization/Instituto Nacional de Colonização e Reforma Agrária) which allows the characterization of family farms in relation to the total universe of farms. In this comparison several variables are shown, including the share of family farming in the total value of production, in the total number of farms, utilization of modern technology and partial factor productivity. Census data shows that family farming has changed from 37.91 percent of total production value to 36.11 percent during a decade of strong expansion of agriculture as a whole, demonstrating the economic relevance of this segment which, besides producing food, is integrated in the most important productive agricultural chains of the Brazilian agribusiness. Family farming is a heterogeneous segment, with different sub-segments. During the studied period of ten years the most rich of these sub-segments (A) has increased participation in total production, while the poorer sub-segments (C and D) have only grown in absolute terms without a corresponding increase in production.