Background: While dietary sources of calcium are important for bone health, the intake of milk and milk products decreases as children get older. A free milk in schools program may mitigate this decrease in milk consumption. We evaluated the Fonterra Milk for schools program (a free milk initiative) by determining changes in children's milk consumption and anthropometric measures over a 2-year period. Methods: The evaluation was conducted in children aged 7-9 years in a representative sample of primary schools participating in the free milk program, in Auckland, New Zealand. The primary outcome was the proportion of children meeting the New Zealand guidelines for dairy and milk product consumption over 7 days (=2 servings per day). Changes in anthropometric measures were also assessed as secondary outcomes. Results: Nine schools (N = 511 children) participated in the evaluation. The proportion of children meeting the New Zealand guidelines for milk and milk product consumption over 7 days increased significantly from baseline to 2 years' follow-up (72% vs 94%; p < 0.001). Body mass index z scores did not change significantly between baseline and 2 years' follow-up. Conclusions: The Fonterra Milk for Schools initiative appears to be an effective way of increasing milk/milk product consumption behaviors in school-aged children.