Objective The objective of this study was to evaluate the situation of food and nutritional (in)security in families of farmers who supply the National School Feeding Program. Methods It is a cross-sectional study with 27 families of farmers (n=91). The socioeconomic, anthropometric, biochemical, food availability and perception of food insecurity indicators of the Brazilian Food Insecurity Scale, as well as the time of supply and annual income originating from the program, were evaluated. Results Food insecurity, as measured by the scale, was present in 25.9% (n=7) of the families. Food insecurity was associated with socioeconomic factors such as per capita income, the presence of children at home and the number of residents. Food and nutritional insecurity caused by a low caloric availability (<2500kcal/day) occurred in 11.0% (n=3) of the families. Presence of dystrophies such as overweight, low weight and short stature individuals occurred in 89.0% (n=24) of the families. Conclusion The study reinforces the existence of variables associated with food insecurity. Social and nutritional factors should be monitored, worked on, and improved in order to achieve food and nutritional security.