Objective: Nutrition education research recruitment expense and effort are substantial; sample selection is crucial for intervention assessment. Effectiveness and cost of Facebook to recruit low-income women to an online nutrition program were examined, including biopsychosocial characteristics of Facebook responders. Methods: An ad appeared on the Facebook page of low-income women, 18-45 years old, living in Pennsylvania to invite access to an online nutrition program. Eligible persons completed surveys about food-related behaviors including eating competence, food security, and assistance program use. Results: Of 465 people who clicked on the ad, 81 completed the eligibility survey, and 62 were eligible; 52 completed a preprogram survey. Completers were mostly white (79%), overweight/obese (mean body mass index 36.2 plus or minus 12.9), and not eating competent (75%). Low-income status was identified for 75% (n = 39) of completers. Total recruitment cost over 19 days was $596.71. Conclusions and Implications: Facebook appears to be an effective tool to recruit low-income women to nutrition education projects. (Contains 2 tables and 2 figures.)