NHIAA Football is the sport of high school football overseen by the New Hampshire Interscholastic Athletic Association (NHIAA) in the U.S. state of New Hampshire. There are currently 57 schools (with five instances of multi-school co-operative teams) that have participating programs throughout the state.
The NHIAA divided football into as few as three, but as many as six divisions between 1992 and 2017. There are four divisions in the state starting with the 2024 season.
(*) indicates multi-school co-op programs
NHIAA state football champions since 1951:
NOTES:
(*) Newport's Towle High School closed and was converted to an elementary school in 1966 as high school students moved into the new Newport High School.<br> (**) Three Manchester Catholic high schools, St. Anthony's High School, Bishop Bradley High School and Immaculata High School, closed and were merged into Trinity High School in 1970.<br> (***) Concord's St. John's High School was converted into an elementary/middle school in 1963 upon the opening of Bishop Brady High School.<br> (****) Salem's Woodbury High School was converted to a middle school upon the opening of Salem High School in 1966.<br> (*****) Hampton Academy and High School was converted to a junior high school (Hampton Academy) after the opening of Winnacunnet High School in 1958.