The 1966 New York Giants season was the franchise's 42nd season in the National Football League (NFL). The season saw the Giants looking to improve on their 7–7 record from 1965. However, they finished in last place in the Eastern Conference with a 1–12–1 record, the worst in franchise history. The 12 losses set a single-season team record that was matched four times before being broken in 2017.