New Hampshire Interscholastic Athletic Association

The New Hampshire Interscholastic Athletic Association (NHIAA) is the governing body for sports competitions among all public and some private high schools in New Hampshire. It is a member of the National Federation of State High School Associations.

Classifications
Schools competing under the NHIAA are grouped into four classes:


 * Division I: over 900 students
 * Division II: 525-899 students
 * Division III: 286-524 students
 * Division IV: up to 285 students

Schools are reclassified every two years. The classification thresholds are periodically adjusted so as to result in an approximately equal number of teams in each class. Schools may petition the NHIAA to play in a class higher than that in which they would otherwise be placed.

For some sports (e.g. football or ice hockey), competition is not organized based on school class, but based on divisions established by the NHIAA committee governing the individual sport.

Classifications for 2017–2018 and the 2018-2019 seasons are as follows:

Division I (formerly Class L)
• Alvirne

• Bishop Guertin

• Bedford

• Concord

• Dover

• Exeter

• Goffstown

• Keene

• Londonderry

• Manchester Central

• Manchester Memorial

• Merrimack

• Nashua North

• Nashua South

• Pinkerton

• Portsmouth

• Salem

• Spaulding

• Timberlane

•  Windham

• Winnacunnet

Division II (formerly Class I)
• Bow

• Coe-Brown

• ConVal

• Hanover

• Hollis/Brookline

• John Stark

• Kearsarge

• Kennett

• Kingswood

• Laconia

• Lebanon

• Manchester West

• Merrimack Valley

• Milford

• Oyster River

• Pelham

• Pembroke

• Plymouth

• Sanborn

• Souhegan

• St. Thomas Aquinas

Division III (formerly Class M)
• Belmont

• Berlin

• Bishop Brady

• Campbell

• Conant

• Fall Mountain

• Franklin

• Gilford

• Hillsboro-Deering

• Hopkinton

• Inter-Lakes

• Mascenic

• Mascoma Valley

• Monadnock

• Newfound

• Newport

• Prospect Mountain

• Raymond

• Somersworth

• Stevens

• Trinity

• White Mountains

• Winnisquam

Division IV (formerly Class S)
• Canaan

• Colebrook

• Concord Christian

• Derryfield

• Epping

• Farmington

• Gorham

• Groveton

• Hinsdale

• Holy Family

• Lin-Wood

• Lisbon

• Littleton

• Moultonborough

• Mount Royal Academy

• Newmarket

• Nute

• Pittsburg

• Pittsfield

• Portsmouth Christian

• Profile

• Sunapee

• Wilton-Lyndeboro

• Woodsville

Sports
The NHIAA sanctions competitions in the following sports: