A national championship(s) is the top achievement for any sport or contest within a league of a particular nation or nation state. The title is usually awarded by contests, ranking systems, stature, ability, etc. This determines the best team, individual (or other entity) in a particular nation and in a particular field. Often, the use of the term cup or championship is just a choice of words.

This list is incomplete; you can help by adding missing items. (February 2011)

• List of Finnish bandy champions
• List of Norwegian bandy champions
• List of Russian bandy champions
• List of Swedish bandy champions
• List of United States bandy champions

• NBA Finals
• NCAA Division I men's basketball tournament
• NCAA Division I women's basketball tournament
• Úrvalsdeild karla
• Úrvalsdeild kvenna

• North American Bridge Championships

• England Boxing National Amateur Championships
• United States national amateur boxing championships

• Golden Gloves

• USA Cross Country Championships
• Foot Locker Cross Country Championships (high school level)

• Super Bowl
• College football national championships in NCAA Division I FBS
• College Football Playoff
• Bowl Championship Series (formerly)
• NCAA Division I Football Championship
• Black college football national championship
• High School Football National Championship
• Irish American Football League
• Shamrock Bowl

• The Masters Tournament
• The United States Open Championship
• The Open Championship
• The PGA Championship

• Intercollegiate Sailing Association National Championships

• USRowing National Championships
• Intercollegiate Rowing Association National Championships (college men and lightweight men and women)
• NCAA Division I Rowing Championship (college openweight women)
• British Rowing Championships
• Australian Rowing Championships

• KNSB Dutch Speed Skating Championships

• United States Swimming National Championships
• United States Short Course Swimming Championships
• Telkom SA National Aquatic Championships
• Australian Swimming Championships
• British Swimming Championships
• Lithuanian Swimming Championships
• Swedish Swimming Championships
• Swedish Short Course Swimming Championships

• Australian Open
• French Open
• US Open
• The Championships, Wimbledon

• Japan Championships in Athletics
• Lithuanian Athletics Championships
• Dutch Athletics Championships
• Dutch Indoor Athletics Championships
• USA Outdoor Track and Field Championships

• NCAA Men's Volleyball Championship

• U Sports Wrestling Championships
• Wrestling Canada Lutte Canadian Wrestling Championships
• Pahlevan of Iran
• Russian National Championships

• NCAA Division I Wrestling Championships, Division II Wrestling Championships, Division III Wrestling Championships, NAIA Wrestling Championship, NCWA Championships